Any rough metrics out there, as to when our size might get too large for a market, and fills are seriously affected? Right now Im a goldfish, trading 0.01% of daily volume. Could I eventually put on trades that are roughly 2-5%, 10%, 20% of average daily volume all in the same direction, but spread out through out course of day... Without moving market too much? I'm thinking of very liquid futures... Corn, nat gas, interest rates, etc.