The strategy is based on rsi and ema. What's good about it is the risk/reward ratio is 3 to 7 and it works pretty well. It's possible to change the settings.

Test on 10 coins at once. Choose the coins that you like according to the backtest. Do not use shitcoins at all.
How to understand that you can not use coins- go to the minute chart, if the chart there looks like a ladder- do not touch the coin. If you are ready to lose, for example, 10% of the deposit on the trade, then with a stop loss value of 5%, put 2 leverage and so on. If there are a lot of transactions, then do not use leverage, since the deposit can be loaded with transactions.