Here's a rough and ready list of what looks like times and prices of a flipper having market impact. Quantities and entry prices are estimates, the times ought to be accurate. I may have missed a few or spotted one too many, this isn't the result of exact science. If I'm right he usually does about 3000-4000 cars at a time, rarely more, and he's reasonably good at calling or causing minor trends. Doesn't always nail it, but certainly good enough to make a living grabbing a few ticks at a time. Comments?