[MichaelGG]

A stop loss with no limit means "if the price hits X, then sell my shares for as low as 0.01/0.001" (same as a market sell order). You can verify this by imagining a single trade below the stop loss, then the only buy order being at 0.01.

If you put a limit on the stop loss then there's no guarantee it'll clear, but at least you won't sell for some ridiculously low amount.

The exchange might have circuit breakers that won't let a particular symbol change more than X% in a given period of time.