I know that lower margin and low leverage are also farther away from the liquidation price, so is it okay to set low margin and low leverage first to avoid losing if your strategy doesn't work, and then add if does the price follow your strategy? Is this also your strategy?
I don't think you should calculate in this manner, rather than this way just simply take the trade with a stop loss and take profit, your stop loss should be defined by the maximum amount of money you are willing to lose on the trade, based on this amount you should start and end the trade if it does not goes into profit, adding up to profitable trades is a good idea but this is successful only in case of a few patterns like in cases of breakout you might not get a chance to enter on a second point because move could be so quick.