Bruno,
I know all about rule of 72, I am a financial advisor.
For Forex it is not a % thing it is a pip thing.
Here is an example, supposing that you that you stay conservative with a 3% risk:
Account side doesn’t matter, consider at the principle
Account: $1000 you make a profit of 30 pips at 0.1 $30
Profit/account = 30/1000=3% gain in 1 trade (and that could be done in 5 min)
So will you double your money after 24 trades? It is possible but very unlikely because you have to win all the trades.
So here is going to be your challenge: Find a system that produces consistency week after week and if so, yes you can work out your formula.
First try with something very small: 10 pips per day, which is about 200 pips per month. Depending on how you do things, that is about 20% per month !
So now you will look back at your original 3% from your question and start to be greedy and wanting more…and more lose trades will come… welcome to Forex.
Good luck with your trading !
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