What I really wanted to know is how often and how much below the stop-loss limit an order could be executed, regardless of the exchange being used (i.e. in general terms). That is, despite setting stop-loss parameters, market conditions could in certain circumstances lead to the sell order being executed for a lower value than that set on the stop-loss order.


Let’s place yersterday’s BTC price scenario, where BTC rose something like 500$ and then dropped that same amount in a rather short period of time (12:20 to 12:56 roughly – depending on UTC settings). The question I had in mind was if the system will sell at a lower price than the limit of the stop-loss if this value is no longer available on the market.

i.e.
BTC Price is 11000 $
I place a stop-loss  order at 10950$ (trigger point), with a limit of 10900$.
If the BTC market value drops abruptly, the 10.900$ order may not be feasible to meet, and that opens 2 scenarios:

-   A) The system sells bellow 10.900$ (so I could lose more than intended).
-   B) The system only sells at  10.900$ (so I waits for that value to be met, which it may not).
I figure what goes on is “A”.