I have read in more than 1 place that an individual trader (any person trader) really does pretty much nothing at all affecting the market is concerned. The idea being that just enormous banks cause significant moves on the market which we are just flies hitching a ride on the backs of the elephants in our retail Forex jobs.

At what point, though, does this change? In the event that you up the lot size to the point at which you are risking $1M....would that push the market in a given direction? How about $10M?

At what point do you become a force to be reckoned with?