Leverage is very important for retail traders like us. Without leverage you need huge capital to gain good profit percentage as a pair moves very little in terms of currency. I don't think that much about leverage proportion as my risk percentage is very low.
Leverage is an investment strategy of using borrowed money—specifically, the use of various financial instruments or borrowed capital—to increase the potential return of an investment. Leverage can also refer to the amount of debt a firm uses to finance assets.
Leverage is a strategy of using borrowed to control larger trade sizes. It's a double edged sword which increases the potential return of an investment and loss as well. Therefore, a good risk management is required to deal with this.
Leverage is important and useful, but only if it is wisely used. It is that weapon, which no doubt can help you to trade and earn extra, but one single wrong decision, taken with impracticality can cost you huge.