diff --git a/data/refdata/exchanges.cfg b/data/refdata/exchanges.cfg
index d1d087e..176b488 100644
--- a/data/refdata/exchanges.cfg
+++ b/data/refdata/exchanges.cfg
@@ -573,68 +573,3 @@
         }
     }
 }
-
-    # , "ALPACA_SIM": {
-    #     # https://docs.alpaca.markets/reference/
-    #     "exchange_id":          "ALPACA"
-    #      , "name":              "Alpaca Trading"
-    #     , "type":               "EQUITY"
-
-
-    #     , "mktdata" : {
-    #         "class":  "cvttpy_trading.exchanges.mkt_simulator.md_client.MktSimMdClientFeed"
-    #         "ws_url": ["WS", "ws://localhost:10180/ws"]
-    #     }
-
-    #     , "order_entry": {
-    #         "class":  "cvttpy_trading.exchanges.mkt_simulator.oe_client.MarketSimulatorOEClient"
-
-    #         , "REST": {
-    #             "new_order_url": ["POST", "http://localhost:10182/order"]
-    #             , "cancel_order_url": ["POST", "http://localhost:10182/cancel"]
-    #             , "cancel_all_url": ["POST", "http://localhost:10182/cancel_all"]
-    #             , "open_orders_url": ["GET", "http://localhost:10182/open_orders"]
-    #             , "order_status_url": ["GET", "http://localhost:10182/order_status"]
-    #         },
-    #         "ws_url": ["WSS", "ws://localhost:10181/ws"]
-    #     }
-    #     , "accounting": {
-    #         "class":  "cvttpy_trading.exchanges.mkt_simulator.acct_client.MktSimAccounting"
-    #         , "REST": {
-    #                 "positions_url": ["GET", "http://localhost:10083/positions"]
-    #                 , "trades_url": ["GET", "http://localhost:10083/trades"]
-    #         }
-    #     }
-    # }
-
-    # , "COINBASE_SIM": {
-    #     "exchange_id":          "COINBASE"
-    #     , "name":               "Coinbase Advanced Trade (Simulation)"
-    #     , "type":               "SPOT"
-
-
-    #     , "mktdata" : {
-    #         "class":  "cvttpy_trading.exchanges.mkt_simulator.md_client.MktSimMdClientFeed"
-    #         "ws_url": ["WS", "ws://localhost:8080/ws"]
-    #     }
-
-    #     , "order_entry": {
-    #         "class":  "cvttpy_trading.exchanges.mkt_simulator.oe_client.MarketSimulatorOEClient"
-
-    #         , "REST": {
-    #             "new_order_url": ["POST", "http://localhost:8181/order"]
-    #             , "cancel_order_url": ["POST", "http://localhost:8181/cancel"]
-    #             , "cancel_all_url": ["POST", "http://localhost:8181/cancel_all"]
-    #             , "open_orders_url": ["GET", "http://localhost:8181/open_orders"]
-    #             , "order_status_url": ["GET", "http://localhost:8181/order_status"]
-    #         },
-    #         "ws_url": ["WSS", "ws://localhost:8180/ws"]
-    #     }
-    #     , "accounting": {
-    #         "class":  "cvttpy_trading.exchanges.mkt_simulator.acct_client.MktSimAccounting"
-    #         , "REST": {
-    #                 "positions_url": ["GET", "http://localhost:8182/positions"]
-    #                 , "trades_url": ["GET", "http://localhost:8182/trades"]
-    #         }
-    #     }
-    # }