COB heatmap WIP
This commit is contained in:
Dobromir Popov
@ -248,16 +248,16 @@ class DataProvider:
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# COB (Consolidated Order Book) data system using WebSocket
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self.cob_integration: Optional[COBIntegration] = None
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# COB data storage - 15 minutes of raw ticks and 1s aggregated data
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self.cob_raw_ticks: Dict[str, deque] = {} # Raw COB ticks (15 min)
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self.cob_1s_aggregated: Dict[str, deque] = {} # 1s aggregated COB data with $1 buckets
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# COB data storage - 30 minutes of raw ticks and 1s aggregated data
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self.cob_raw_ticks: Dict[str, deque] = {} # Raw COB ticks (30 min)
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self.cob_1s_aggregated: Dict[str, deque] = {} # 1s aggregated COB data with $1 buckets (30 min)
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# Initialize COB data structures
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for symbol in self.symbols:
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# Raw ticks: 15 minutes at ~100 ticks/second = ~90,000 ticks
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self.cob_raw_ticks[symbol] = deque(maxlen=90000)
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# 1s aggregated: 15 minutes = 900 seconds
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self.cob_1s_aggregated[symbol] = deque(maxlen=900)
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# Raw ticks: ~100 ticks/second * 30 minutes = ~180,000 ticks
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self.cob_raw_ticks[symbol] = deque(maxlen=180000)
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# 1s aggregated: 30 minutes = 1,800 seconds
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self.cob_1s_aggregated[symbol] = deque(maxlen=1800)
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# COB callbacks for data distribution
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self.cob_data_callbacks: List[Callable] = []
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@ -4317,7 +4317,10 @@ class DataProvider:
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loop = asyncio.new_event_loop()
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asyncio.set_event_loop(loop)
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ws = loop.run_until_complete(get_huobi_cob_websocket(self.symbols))
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ws.add_cob_callback(lambda symbol, data: asyncio.run_coroutine_threadsafe(self._merge_huobi_tick(symbol, data), loop))
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# Register an async callback that runs in the same event loop
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async def on_huobi(symbol, data):
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await self._merge_huobi_tick(symbol, data)
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ws.add_cob_callback(on_huobi)
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loop.run_forever()
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except Exception as he:
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logger.error(f"Error in Huobi WS thread: {he}")
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@ -4340,32 +4343,50 @@ class DataProvider:
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latest = {}
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if hasattr(self, 'cob_data_cache') and symbol in self.cob_data_cache and self.cob_data_cache[symbol]:
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latest = dict(self.cob_data_cache[symbol][-1])
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# Construct merged bids/asks limited depth
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hb_bids = huobi_data.get('bids', []) or []
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hb_asks = huobi_data.get('asks', []) or []
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bn_bids = latest.get('bids', []) if isinstance(latest.get('bids'), list) else []
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bn_asks = latest.get('asks', []) if isinstance(latest.get('asks'), list) else []
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# Normalize levels to [price, size] lists
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def to_pairs(levels):
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pairs = []
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for lvl in levels or []:
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try:
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if isinstance(lvl, dict):
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p = float(lvl.get('price', 0)); s = float(lvl.get('size', 0))
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if s > 0:
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pairs.append([p, s])
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else:
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# Assume [price, size]
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p = float(lvl[0]); s = float(lvl[1])
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if s > 0:
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pairs.append([p, s])
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except Exception:
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continue
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return pairs
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hb_bids = to_pairs(huobi_data.get('bids'))
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hb_asks = to_pairs(huobi_data.get('asks'))
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bn_bids = to_pairs(latest.get('bids'))
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bn_asks = to_pairs(latest.get('asks'))
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# Concatenate and re-sort with depth limit
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merged_bids = (bn_bids + hb_bids)[:2000]
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merged_asks = (bn_asks + hb_asks)[:2000]
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merged_bids = (bn_bids + hb_bids)
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merged_asks = (bn_asks + hb_asks)
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if merged_bids:
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merged_bids.sort(key=lambda x: x['price'], reverse=True)
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merged_bids.sort(key=lambda x: x[0], reverse=True)
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if merged_asks:
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merged_asks.sort(key=lambda x: x['price'])
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merged_asks.sort(key=lambda x: x[0])
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merged_bids = merged_bids[:1000]
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merged_asks = merged_asks[:1000]
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# Stats from merged
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if merged_bids and merged_asks:
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best_bid = merged_bids[0]['price']
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best_ask = merged_asks[0]['price']
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best_bid = merged_bids[0][0]
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best_ask = merged_asks[0][0]
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mid = (best_bid + best_ask) / 2.0
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spread = best_ask - best_bid
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spread_bps = (spread / mid) * 10000 if mid > 0 else 0
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top_bids = merged_bids[:20]
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top_asks = merged_asks[:20]
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bid_vol = sum(x['price'] * x['size'] for x in top_bids)
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ask_vol = sum(x['price'] * x['size'] for x in top_asks)
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bid_vol = sum(x[0] * x[1] for x in top_bids)
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ask_vol = sum(x[0] * x[1] for x in top_asks)
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total = bid_vol + ask_vol
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merged_stats = {
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'best_bid': best_bid,
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@ -4383,9 +4404,9 @@ class DataProvider:
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# Create merged snapshot (preserve original + annotate source)
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merged = {
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'symbol': symbol,
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'timestamp': time.time(),
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'bids': merged_bids,
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'asks': merged_asks,
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'timestamp': int(time.time() * 1000), # milliseconds to match rest of cache
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'bids': merged_bids[:200], # keep reasonable depth
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'asks': merged_asks[:200],
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'stats': merged_stats,
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'source': 'merged_ws',
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'exchanges': ['binance', 'huobi']
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@ -4897,26 +4918,74 @@ class DataProvider:
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values: List[List[float]] = []
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mids: List[float] = []
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latest = self.get_latest_cob_data(symbol)
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if not latest or 'stats' not in latest:
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return times, prices, values, mids
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mid = float(latest['stats'].get('mid_price', 0) or 0)
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if mid <= 0:
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return times, prices, values, mids
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bucket_size = 1.0 if 'ETH' in symbol else 10.0
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center = round(mid / bucket_size) * bucket_size
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prices = [center + i * bucket_size for i in range(-bucket_radius, bucket_radius + 1)]
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# Build exactly 1 snapshot per second (most recent 'seconds' seconds), using cache
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with self.subscriber_lock:
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cache_for_symbol = getattr(self, 'cob_data_cache', {}).get(symbol, [])
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snapshots = list(cache_for_symbol[-seconds:]) if cache_for_symbol else []
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cache_map = getattr(self, 'cob_data_cache', {})
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cache_for_symbol = cache_map.get(symbol, [])
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# Fallback: try alternate key without slash (e.g., ETHUSDT)
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if not cache_for_symbol:
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alt_key = symbol.replace('/', '').upper()
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cache_for_symbol = cache_map.get(alt_key, [])
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snapshots: List[dict] = []
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if cache_for_symbol:
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# Walk backwards and pick the last snapshot per unique second
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selected_by_sec: Dict[int, dict] = {}
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for snap in reversed(cache_for_symbol):
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ts = snap.get('timestamp')
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if isinstance(ts, (int, float)):
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sec = int(ts / 1000) if ts > 1e10 else int(ts)
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if sec not in selected_by_sec:
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selected_by_sec[sec] = snap
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if len(selected_by_sec) >= seconds:
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break
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# Order by time ascending
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for sec in sorted(selected_by_sec.keys()):
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snapshots.append(selected_by_sec[sec])
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# If dedup by second produced nothing (unexpected), fallback to last N snapshots
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if not snapshots:
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snapshots = list(cache_for_symbol[-seconds:])
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# If no snapshots, nothing to render
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if not snapshots:
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return times, prices, values, mids
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# Determine center price from the most recent valid snapshot in our selection
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bucket_size = 1.0 if 'ETH' in symbol else 10.0
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center = 0.0
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for snap in reversed(snapshots):
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try:
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stats = snap.get('stats') or {}
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center = float(stats.get('mid_price', 0) or 0)
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if center <= 0:
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# derive from best bid/ask
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def first_price(level):
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try:
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return float(level.get('price')) if isinstance(level, dict) else float(level[0])
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except Exception:
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return 0.0
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bids = snap.get('bids') or []
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asks = snap.get('asks') or []
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best_bid = max((first_price(b) for b in bids), default=0.0)
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best_ask = min((first_price(a) for a in asks), default=0.0)
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if best_bid > 0 and best_ask > 0:
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center = (best_bid + best_ask) / 2.0
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if center > 0:
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break
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except Exception:
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continue
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if center <= 0:
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return times, prices, values, mids
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center = round(center / bucket_size) * bucket_size
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prices = [center + i * bucket_size for i in range(-bucket_radius, bucket_radius + 1)]
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for snap in snapshots:
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ts_ms = snap.get('timestamp')
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if isinstance(ts_ms, (int, float)):
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times.append(datetime.fromtimestamp(ts_ms / 1000.0))
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# Detect if ms or s
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ts_s = ts_ms / 1000.0 if ts_ms > 1e10 else float(ts_ms)
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times.append(datetime.fromtimestamp(ts_s))
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else:
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times.append(datetime.utcnow())
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@ -4926,7 +4995,11 @@ class DataProvider:
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bucket_map: Dict[float, Dict[str, float]] = {}
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for level in bids[:200]:
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try:
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price, size = float(level[0]), float(level[1])
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# Level can be [price, size] or {'price': p, 'size': s}
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if isinstance(level, dict):
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price = float(level.get('price', 0.0)); size = float(level.get('size', 0.0))
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else:
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price, size = float(level[0]), float(level[1])
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bp = round(price / bucket_size) * bucket_size
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if bp not in bucket_map:
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bucket_map[bp] = {'bid': 0.0, 'ask': 0.0}
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@ -4935,7 +5008,10 @@ class DataProvider:
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continue
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for level in asks[:200]:
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try:
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price, size = float(level[0]), float(level[1])
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if isinstance(level, dict):
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price = float(level.get('price', 0.0)); size = float(level.get('size', 0.0))
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else:
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price, size = float(level[0]), float(level[1])
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bp = round(price / bucket_size) * bucket_size
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if bp not in bucket_map:
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bucket_map[bp] = {'bid': 0.0, 'ask': 0.0}
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@ -4945,8 +5021,13 @@ class DataProvider:
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# Compute mid price for this snapshot
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try:
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best_bid = max((float(b[0]) for b in bids), default=0.0)
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best_ask = min((float(a[0]) for a in asks), default=0.0)
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def first_price(level):
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try:
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return float(level.get('price')) if isinstance(level, dict) else float(level[0])
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except Exception:
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return 0.0
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best_bid = max((first_price(b) for b in bids), default=0.0)
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best_ask = min((first_price(a) for a in asks), default=0.0)
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if best_bid > 0 and best_ask > 0:
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mids.append((best_bid + best_ask) / 2.0)
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else:
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