Thank for your response guys.

I am looking a little bit more about position sizing.
In the training, the following money management formula is given:

Margin = 0.5 *OptimalF * Capital * sqrt(1 + ProfitClosed/Capital);

let say that capital=1000$
and with have only 1 asset so OptimalF=1

This mean that the margin is equal to half the capital ? This mean that you are likely to loose half of your capital for one trade ?

I think that is a bit too much. I don't understand how the lot is calculated, it shall be based on the stop limit isn't it ?

About the weekend, is it possible to lower the order size of your trade before the week end ?