Support Board
Date/Time: Wed, 15 Apr 2026 09:14:50 +0000
DTC JSON Compact – External Client Market Data Request Behavior
View Count: 219
| [2026-02-27 20:16:47] |
| UserFXGroup - Posts: 2 |
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Hi, I am running Sierra Chart connected to CQG WebAPI (live). The DTC Protocol Server is enabled with JSON Compact encoding. Please note, I am connecting from an external Python client via DTC. When connecting to: Trading Port (11099) – connection remains stable Historical Data Port (11098) – connection is closed after sending a Market Data Snapshot request (Type 101) Questions: Is a SecurityDefinitionForSymbolRequest required before sending a Market Data Snapshot when using JSON Compact? Is real-time market data via DTC supported when Sierra is connected to CQG WebAPI? Is there a required message sequence for market data requests on port 11098 from an external client? Thank you! |
| [2026-02-27 20:33:33] |
| John - SC Support - Posts: 45634 |
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Is real-time market data via DTC supported when Sierra is connected to CQG WebAPI?
Data is not available through DTC at all regardless of the service that is connected. The exchanges simply do not allow this, so it had to be made unavailable for DTC. Refer to the following: Data and Trading Communications (DTC) Protocol Server: Restrictions For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing |
| [2026-02-28 18:13:14] |
| UserFXGroup - Posts: 2 |
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Oh, yes, I know. I poorly framed this question. Regardless, I believe I found a solution to the actual problem that I was having. Sorry for wasting your time. Thank you for the response! |
| [2026-03-01 00:50:05] |
| Sierra_Chart Engineering - Posts: 23509 |
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Historical Data Port (11098) – connection is closed after sending a Market Data Snapshot request (Type 101) That port does not support a market data request which is for streaming or snapshot data. Only historical data requests.Is a SecurityDefinitionForSymbolRequest required before sending a Market Data Snapshot when using JSON Compact? No definitely not.Is real-time market data via DTC supported when Sierra is connected to CQG WebAPI? Not for data from CQG.Is there a required message sequence for market data requests on port 11098 from an external client? No.
Sierra Chart Support - Engineering Level Your definitive source for support. Other responses are from users. Try to keep your questions brief and to the point. Be aware of support policy: https://www.sierrachart.com/index.php?l=PostingInformation.php#GeneralInformation For the most reliable, advanced, and zero cost futures order routing, use the Teton service: Sierra Chart Teton Futures Order Routing Date Time Of Last Edit: 2026-03-01 02:12:15
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