Support Board
Date/Time: Sat, 08 Aug 2026 21:22:44 +0000
Post From: Attached order (take-profit) cancel/replace rejected during partial parent fill
| [2026-06-26 12:33:18] |
| User229520 - Posts: 1 |
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I am experiencing the exact same issue as described in this thread, and wanted to add my case as additional evidence that this is a recurring problem with Rithmic Direct DTC and bracket orders on partial fills. My setup: - Symbol: MNQU6.CME (Micro NQ) - Broker: Lucid (prop account) - Order routing: Rithmic Direct - DTC - Order type: Market parent with attached Target (Limit) and Stop, Client side bracket / Server side OCO - Entry quantity: 5 contracts What happens: When my Market parent order fills in two partial fills (e.g. 3 then 2 contracts), Sierra Chart immediately attempts to modify the Stop child order quantity from 3 to 5. Rithmic rejects this modification with 'Order modification failed | Rithmic Direct - DTC (Order cancel/replace reject)'. This rejection triggers a popup window (Trade Service Log) that opens on top of my chart at the exact moment of entry, blocking my view of the trade. From my Trade Activity Log (account LTE025-6JG32VR8-TEST001, 2026-06-25 UTC): - Internal Order ID 37741 (parent Market Buy x5), filled at 14:01:31 UTC in two partial fills - Internal Order ID 37743 (Stop child), modification from qty 3 to 5 rejected at 14:01:32.149 UTC - Stop filled at 14:01:36 UTC — only 5 seconds after entry - Same pattern repeated on Internal Order ID 37744/37746 at 14:02:55 UTC 'Reactivate Attached Order when Rejected Modification During Fill' is set to Yes in my settings. My questions: 1. Is there any Sierra Chart-side setting that would prevent the Trade Service Log popup from opening automatically when this rejection occurs, without disabling all error notifications? 2. Would disabling 'Adjust Attached Orders to Maintain Same Offset on Parent Fill' help avoid the rejection, and what would be the exact side effect on stop/target quantity management? 3. Is this rejection specific to Rithmic's handling of cancel/replace during fast fills, and is there any known workaround short of switching to Teton? I have the full Trade Activity Log export available if needed. Thank you |
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