I became a trader for a long time and only recently have I experienced a considerable loss, with 1 late reason to sell. I don't understand for before if maybe there is a time to set the market, and far from my mind. Because I also often experience considerable profits in weekly trading. For now I don't want to comment too much, because I stopped trading for a while. While waiting for capital.
I had the same experience as well but instead of being late to sell I fell asleep I lost 300mbtc(the price of btc was 1.3k$ at the time)that day.
I was focusing on trading back then and have little to no sleep since I still have a day job. after losing 300 mbtc I stopped trading completelty
because I am too shocked about losing 300mbtc. I know 300mbtc may not be a lot back then but in my country that could provide me for months.