just a simple question here… is it possible that we can manually adjust the settings by ourself so that we can have a leverage that we desire?
or can we request to the broker to ask for leverage that we desire?
thanks for the answers, appreciate it 
You misunderstand leverage. Simply reduce your trade size since leverage is a function of your risk not the platfrom leverage which dictates how much equity you must have with the broker to cover the trade
The answer to whether your broker will allow you to change your allowable leverage is some do, some don’t. Oanda, for example, allows you to make adjustments.