help me on stop loss!

are not. No one will be able to help us recover from losses. Only one can learn, my friend.
But if you still want to join why don't you think about mini account. although it also has its own flaws and advantages

What's wrong with mini accounts?

i would say theres limited things you can do with it...

for example u may only be able take 2 trades and say you want to take another trade you might not have sufficient margin left to do so. .and maybe that trade would be a big trade.. having different positions can help as you can indirectly hedge things and diversify the risk

underfunding is one of the biggest reasons retail traders fail,,,

people have this pie in the sky ideas that there 500 usd account is going to get them somewhere it really wont...

New traders should start trading in mini account with little capital, It is the best way to start.

Placing stop loss is one of the difficult tasks in trading. So many things to consider. Your trading style, risk tolerance capability and good knowledge about support and resistance levels are important to place a stop loss.