I can tell you this. If you put in a market stop order.
They will NEVER fill you at that trigger price.
100% of the time they will hold your order and then eventually fill you much lower.
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Replying to @MasterBJones and @traderbjones
Linit order mysteriously not filled? Bank transfers immediately available but earned cash not immediately available? Things like this might be explainable but are also quite shady at the same time.