Imagine, I have put stop loss order for one crypto at $0.301, is it possible that if no one put a buy order at this price, my order will not be filled? I don't know how it works in such cases. Although the event is very unlikely to happen but, technically it's possible that no buyer put an order at $0.301
What will happen to my order?
It depends and crashes on market appear when many stop loss orders are failed to be filled. Cascade effects can kill your stop loss orders. The massacre will do its works on different layers of stop loss orders.
The stop limit orders are created to prevent failures of stop loss orders but you have to choose a good price difference between stop limit price and stop loss price. If two prices are close to each other, you will be killed too. Why? The difference is small and your stop limit order does not have enough time to trigger your stop loss order. Prices at 2 orders are filled in seconds with flash crash.
Stop limit order