It is very important for us to be able to manage the funds that we use to trade with careful. you can use 0.01 lot size with 1:1000 leverage so you can get big free margin in your capital. its need 10000 pips to make you get margin call. but with 0.01 lot size you will need 100 pips profit to earn 1 $ (or 1% profit from your capital). so its depend on you to take the risk or avoid it.