Simple trading rules every trader should know :-

1)Backtest more. Trading is like a sport . You have to work underpressure .
2)Be Ok with losing . It sounds painful but yes you have to be a good at it .
3)Create a trading system .
4)Never fall in love with your trade.
5)Find a mentor traders . Traders should never try to learn on their own cause that will end up losing all their money . better find an expert and learn from them .
6)Never Break your trading rules
7) Learn from your mistakes