At What Point Are You No Longer the "Fly on the Back of the Elephant"

I've read in more than one place that an individual trader (any individual trader) really does pretty much nothing where impacting the market is concerned. The idea being that only huge banks induce significant moves in the market and that we are just flies hitching a ride on the backs of these elephants in our retail Forex endeavors.

At what point, though, does this change? If you up the lot size to the point where you're risking $1M....would that push the market in a particular direction? How about $10M?

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

I would say if you can trade a few hundred million during the start of the asian session, you might be able to move the market just a wee bit.

Sometimes you can take out a pipette (0.1 pips) with just a few hundred thousand (on a single trading venue, not market wide) during lower liquidity times... but in general, you need a few million to make a dent on your own, and even then we're talking within a pip or two.

This is, of course, should things stay static on a book of orders, and the market never stays static... LP's are willing to provide a given amount of liquidity so long as it's safe for them to do so. That means when some underlying market metric shifts, so do the LP's posted prices. Thus, it's hard to measure your individual impact unless it's unusually large.

However, you'd be easily able to see the impact if you market order 500+million in a single click. But please don't do that just to see what happens.

great advice right there!
Sorry for the newbie question now: if i'm getting this right, only those "elephants", like FXAssassin called them, can shift the market. And obviously they will do it. So how hard can it be to anticipate those moves and reaaly hitch a ride?