1:50 is a suitable leverage for me. It requires not many money to trade. I earn enough when take the right order and loose not too much while lossing. Further more, it takes moderate required margin, you might trade nearly all your money before recieving margin call.
some brokers provide very high leverage, I wonder, does anyone use it to trade??? and some provide too low leverage, so people have to deposit much to trade. when placing the wrong order, you have to pay high price for that.
I'm with Tickmill now, with the minimum leverage is 1:50, and it suits my strategy.