When it comes to risk management or how much you should spend % of your total capital into your trades then its up to someone's decision and this will really vary from person to person because we do have different capacities when it comes to financial aspect and the level of risk management.

It doesn't matter if you use 5% or 10% or even more as long as you have seen some opportunities for you to take advantage of it. It's up to you. It's your money and it's your right whatever position you'd like to take.

Just make sure that you are aware of the risk of putting up much bigger, but if you are a type of trader who does not really like to get some peanuts, then if you are a type of trader who does not really like to get some peanuts, you can always opt for a bigger trading position.