Is it possible for one to manipulate the price of a currency pair by selling or buying a huge amount? I don’t want to buy a huge lot and the price goes down because my own trade made it go down. I don’t want my own trade to change the price trend because if I buy more than is actually being traded on the market, it more likely will go in the opposite direction I want it to go.

Trading indicators are best used along with money management and good risk control, using tesnical indicators alone will not enable you to ne a successful trader, the market is just too random