The minimum capital that is required to trade effectively and compound profit is 50$; anything below that means that you are literally wasting your own calls, signals; because without a good capital; the only way to make money is if you are making over 100% profit which is not sustainable. Your profit is someone else trade capital; so i implore us to twice your trading capital.
And once again, if you are to scared to loose money; then don't trade, it is not for you
I think capital is really an issue, that is why many traders always loss because they are lack of capital and they always afraid to loss specially when the capital is very small, it has really a big difference if we trade with small capital than big capital, so I believe that trading is a game of capital.
The influenced that will make you decide to sell your assets when you don't have enough money to spare, it's relevant that capital play a good part when you are dealing with this business, you have to be more precise when you are into this business, the deeper your capital the better chance that you have.
though it's your knowledge really affects everything in terms of success, but with good bankroll to invest the better chance, you have to last long and survive.