High and low leverage are sue different traders according to their strategy, but the most importunate thing is safety. i uses 1:1000 leaverage according to my trading strategy. but the too high leverage is very harmful for beginners. To choose a right leverage you should have following information. 1- maintain low level of leverage 2- Use trailing stop to protect your capital 3-Limit capital to 1% to 2% of total trading capital on each position taken.