Can anyone tell me if they have the same issue on Binance

Whenever I place a long/ short order wether it is at the support or resistance if there iw momentum. The price always reacts if I have a high leverage 10x or more. I always see ROI going down -20% to -30% as soon as I close, it jumps up how is this not manipulation? If it is not, explain why this does not happen as often when I place 3-5x leverage?

How is this decentralized if the token manipulation is centralized at investors/whales levels. They can view wallet holdings, longs or shorts open, max leverage … etc, for a normal trader Joe, we may not have that much expereince but this is not fair… not at all for the small guy trying to make ends meet