Leverage Effect on ROI

  1. Is it possible to calculate the leverage we need to use? any formula? based on our capital and margins by broker and 2% Risk?
  2. If we go from 1:25 to 1:50 leverage, how this changes the ROI?
  3. Lets say we have $1000 and leverage is set on 1:50, when we say ROI of 10%, does it mean the profit is $100 or $5000?

Be cautious about using leverage because sometimes using high leverage can be detrimental to you.