I found one thread with same issue discussed but it is more related to the coding:
Market orders always fail because of error #4756 [Unsupported filling mode]
![Market orders always fail because of error #4756 [Unsupported filling mode] Market orders always fail because of error #4756 [Unsupported filling mode]](https://c.mql5.com/36/56/market-orders-always-fail-because.jpg)
Market orders always fail because of error #4756 [Unsupported filling mode]
- 2022.01.25
- www.mql5.com
Hello guys, I plot a line in my chart, called "sl". Then I execute my code and I always receive this [Unsupported filling mode] error #4756...
Sergey Golubev #:
Thank you Sergey Golubev, let me check it out.
I found one thread with same issue discussed but it is more related to the coding:
Market orders always fail because of error #4756 [Unsupported filling mode]

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Hello friends,
I am puzzled by an error, Every time i strategy test, the orders don't get executed and the error is "Unsupported filling mode
I am crowdsourcing for possible reasons why this is happening and how i can solve this puzzle, any help will be greatly valued with gratitude and appreciation