This depend on the price action of each coins and the target profit, in my experience duration when buy and sell in day trading can be around 2 days , but if the price stay stagnan the duration can be longer. At the moment my target profit for every trade is 10% and stop loss 5%, and the price can be reached the target or the stop loss around 1 to 3 days.
The current market price is unstable in the day as today. It was from $ 6,600 and dropped to $ 6200, so stopping losses in day is still a difficult thing to say. A few days ago I invested XLM at $ 0.3 per coin, but now it's down to $ 0.21 per coin.