OK, so now I know how to fiddle the price range on a stock. I...

OK, so now I know how to fiddle the price range on a stock. I will try this and see if I get away with it or if Commsec rejects the ammended order. It seems a cheap way of lowering the bids before buying a larger amount. Does it work at the top of the market, sell a minimum amount, amend the order and buy a piddling amount[off yourself] at a higher price.