Currency Trading - Can I buy & hold using leverage for as long as I want?

Let’s say I believe that one currency will go up in relation to another, but I’m not exactly sure when it will move.

Is it possible to buy, for example, 100,000 units (using 1000 units at 100x leverage) and hold for as long as I want?

From what I understand, there is an automatic “sell” order 2 trading days after the buy. Is there a way to circumvent this, still using leverage and without sacrificing the same profit potential?

Thank you,

~Libre~