Actually it depend on our capital. Because when we trade with big capital then we increase our lot size for trading. Then it effect loss or profit more site. I think 5-10 is best for as our stop loss.

Stop loss is very important for trader . It will protect trader from huge loss . Stop loss depend on your strategy and money management . I think 30 pips is good as stop loss . Trader also need to use take profit as 50/60 pips . Stop loss and take profit can be different .