It is hard to determine the best level one should use, as it mainly depends on the trader's strategy and the actual vision of upcoming market moves. As a rule of thumb, the longer you expect to keep your position open, the smaller the leverage should be. This would be logical, as long positions are usually opened when large market moves are expected. However, when you are looking for a long lasting position, you will want to avoid being 'Stopped Out' due to market fluctuations.
400:1: Four-hundred-to-one leverage means that for every $1 you have in your account, you can place a trade worth $400. Some brokers offer 400:1 on mini lot accounts but beware any broker who offers this type of leverage for a small account. Anyone making a $300 deposit into a forex account and trying to trade with 400:1 leverage could be wiped out in a matter of minutes.
For retail clients, leverages of up to 1:30 for currency pairs and 1:20 for indices are available. For professional clients, a maximum leverage of up to 1:500 is available for currency pairs, indices, energies and precious metals. Both retail and professional status come with their own unique benefits and trade-offs, so it's a good idea to investigate them fully before trading. Find out today if you're eligible for professional terms, so you can maximise your trading potential, and keep your leverage where you want it to be!