diff --git a/data/refdata/exchanges.cfg b/data/refdata/exchanges.cfg
index 2c75fbd..f615efd 100644
--- a/data/refdata/exchanges.cfg
+++ b/data/refdata/exchanges.cfg
@@ -1,55 +1,55 @@
 @var DatabaseHost=cryptoval1.cvtt.vpn
 # @var DatabaseHost=cryptoval1.sheynin.home
 {
-    "__DUMMY__": {}
+    "__DUMMY__": {},
     # ----------------------------- A
-    , "__TRADING_SIMULATOR__": {
-        #  ------ VALUES TO BE REPLACED 
-        # "exchange_id":          "COINBASE"
-        # , "name":               "Coinbase AT (Simulated)"
-        # , "type":               "SPOT"
-        # , "quote_asset":        "USD"
+    # "__TRADING_SIMULATOR__": {
+    #     #  ------ VALUES TO BE REPLACED 
+    #     # "exchange_id":          "COINBASE"
+    #     # , "name":               "Coinbase AT (Simulated)"
+    #     # , "type":               "SPOT"
+    #     # , "quote_asset":        "USD"
 
-        # Environment setting example
-        # ------------------------------------
-        # SIM_ORDER_ENTRY_WS_PORT=28081
-        # SIM_ORDER_ENTRY_REST_PORT=28082
-        # SIM_ACCOUNTING_REST_PORT=28083
-        # SIM_HOST=rt_simulator  # for **docker compose** service rt_simulator
-        "exchange_id": "__SIM-EXCHANGE-ID-PLACEHOLDER__"
-        "mktdata" : {
-            # 
-            "class":  "cvttpy_trading.exchanges.mkt_simulator.md_client.DisabledRtSimulatorMdFeed"
-        },
-        "order_entry": {
-            "class":  "cvttpy_trading.exchanges.mkt_simulator.oe_client.MarketSimulatorOEClient"
+    #     # Environment setting example
+    #     # ------------------------------------
+    #     # SIM_ORDER_ENTRY_WS_PORT=28081
+    #     # SIM_ORDER_ENTRY_REST_PORT=28082
+    #     # SIM_ACCOUNTING_REST_PORT=28083
+    #     # SIM_HOST=rt_simulator  # for **docker compose** service rt_simulator
+    #     "exchange_id": "__SIM-EXCHANGE-ID-PLACEHOLDER__"
+    #     "mktdata" : {
+    #         # 
+    #         "class":  "cvttpy_trading.exchanges.mkt_simulator.md_client.DisabledRtSimulatorMdFeed"
+    #     },
+    #     "order_entry": {
+    #         "class":  "cvttpy_trading.exchanges.mkt_simulator.oe_client.MarketSimulatorOEClient"
 
-            , "api": {
-                "web_socket": {
-                    "url": "ws://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_WS_PORT}/ws"
-                }
-                , "REST": {
-                    "open_orders_url": ["GET", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/open_orders"]
-                    , "order_status_url": ["GET", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/order_status"]
-                    , "new_order_url": ["POST", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/order"]
-                    , "cancel_order_url": ["POST", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/cancel"]
-                    , "cancel_all_url": ["POST", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/cancel_all"]
-                }
-            }
-        },
+    #         , "api": {
+    #             "web_socket": {
+    #                 "url": "ws://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_WS_PORT}/ws"
+    #             }
+    #             , "REST": {
+    #                 "open_orders_url": ["GET", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/open_orders"]
+    #                 , "order_status_url": ["GET", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/order_status"]
+    #                 , "new_order_url": ["POST", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/order"]
+    #                 , "cancel_order_url": ["POST", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/cancel"]
+    #                 , "cancel_all_url": ["POST", "http://@env{SIM_HOST}:@env{SIM_ORDER_ENTRY_REST_PORT}/cancel_all"]
+    #             }
+    #         }
+    #     },
 
-        "accounting": {
-            "class":  "cvttpy_trading.exchanges.mkt_simulator.acct_client.MktSimAccounting"
+    #     "accounting": {
+    #         "class":  "cvttpy_trading.exchanges.mkt_simulator.acct_client.MktSimAccounting"
 
-            , "api": {
-                "REST": {
-                    "positions_url": ["GET", "http://@env{SIM_HOST}:@env{SIM_ACCOUNTING_REST_PORT}/positions"]
-                    , "trades_url": ["GET", "http://@env{SIM_HOST}:@env{SIM_ACCOUNTING_REST_PORT}/trades"]
-                }
-            }
-        }
-    }
-    , "ALPACA_PROD": {
+    #         , "api": {
+    #             "REST": {
+    #                 "positions_url": ["GET", "http://@env{SIM_HOST}:@env{SIM_ACCOUNTING_REST_PORT}/positions"]
+    #                 , "trades_url": ["GET", "http://@env{SIM_HOST}:@env{SIM_ACCOUNTING_REST_PORT}/trades"]
+    #             }
+    #         }
+    #     }
+    # }, 
+    "ALPACA_PROD": {
         # https://docs.alpaca.markets/reference/
         "exchange_id":          "ALPACA"
          , "name":               "Alpaca Trading"