Support Board
Date/Time: Mon, 15 Sep 2025 16:45:45 +0000
Post From: Subject: DTC Protocol Historical Data Request - Python Client Issues
| [2025-09-10 15:56:36] |
| User810926 - Posts: 1 |
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Hello, I'm developing a Python client to retrieve historical data only (not live streaming) from Sierra Charts DTC Protocol Server for MYM futures backtesting. Current Setup: Sierra Charts Instance #2 configured as DTC server DTC Protocol Server enabled on ports 11109/11110 JSON encoding, market data relay allowed Connection successful to both ports Issue: TCP connection works ✅ Logon requests sent but no logon response received ❌ Connection times out after heartbeat interval Code Used (based on support thread solutions): dtc_logon_request = {'Type': 1, 'ProtocolVersion': 8, 'Username': '', 'Password': '', 'HeartbeatIntervalInSeconds': 30} request_data = json.dumps(dtc_logon_request, ensure_ascii=True).encode('latin-1') request_data += b'\x00' client_socket.sendall(request_data) Sierra Charts Message Log shows: "DTC Protocol Server: New client connection accepted" "DTC client disconnected" (after timeout) No logon processing messages Questions: Is there a specific configuration needed for historical data access? Are there additional authentication requirements for MYM futures data? What's the correct message format for historical data requests? Goal: Retrieve historical MYM futures bars for backtesting (not live streaming). Any guidance would be greatly appreciated. |