added coin API WS implementation

web/component_manager.py

@@ -377,8 +377,21 @@ class DashboardComponentManager:
                     overview_panel
                 ])
 
-            # --- Right Panel: Compact Ladder ---
+            # --- Right Panel: Compact Ladder with optional exchange stats ---
+            exchange_stats = (update_info or {}).get('exchanges') if isinstance(update_info, dict) else None
             ladder_panel = self._create_cob_ladder_panel(bids, asks, mid_price, symbol)
+            if exchange_stats:
+                # Render a tiny exchange contribution summary above ladder
+                try:
+                    rows = []
+                    for ex, stats_ex in exchange_stats.items():
+                        rows.append(html.Small(f"{ex}: {stats_ex.get('bids',0)}/{stats_ex.get('asks',0)}", className="text-muted me-2"))
+                    ladder_panel = html.Div([
+                        html.Div(rows, className="mb-1"),
+                        ladder_panel
+                    ])
+                except Exception:
+                    pass
             # Append small extras line from aggregated_1s and recent_ticks
             extras = []
             if update_info: