I lost money on binances alarm feature

I set an alarm on binance to know if the price of a coin( cardano to be precise ) drops below a number, i logged on next day to see binance had sold my investment at that low level and when I saw it, it had risen in price, so I just lost a bit of money on this alarm feature. Does this mean whenever I use the alarm thing that binance are going to just sell you out if the price goes past the alarm level? I just wanna know more because I am now someone who will be more careful before using alarms. I deleted all my other alarms after this little ( what could have been bigger) loss.