i only post occasionally, usually when i'm in a real fix such as now IÂ¡Â¯ve recently been brought down to earth using IB papertrading as IÂ¡Â¯ve realised that market orders can NOT be used just as a stock is about to fall/rise very fast, because by the time theyÂ¡Â¯re executed the whole thing is usually over. On the other hand, if I use a limit order I rarely get filled at all. This morning for instance I tried to enter AMMD with a market order at about 18.20.. a full 2 minutes later I was still waiting, and the stock was around 18.40, just around about where I was supposed to be getting out! (is this normal? Please tell me it isnÂ¡Â¯t!) Unbelievably frustrating of course, as my Â¡Â°systemÂ¡Â± tells me with pretty good reliability when and where these moves are going to occur, but since they are mostly within 30 minutes of the open when the market is at its most chaotic, and often only take a few seconds, I appear to have essentially no chance of profiting from them in practice. So do you use market or limit orders? or what? Do you accept that itÂ¡Â¯s not possible to take advantage of sudden moves of, say, 1% in 30 seconds, and instead aim for entries that are setting themselves up slowly enough to give you time to get in? Or could it simply be that IBÂ¡Â¯s fills are a lot faster in real accounts than papertrading accounts? somebody please put my mind at rest as IÂ¡Â¯m starting to think that IÂ¡Â¯ve wasted the last 2 years preparing in theory to do something thatÂ¡Â¯s impossible in practice thanks in advance, bryn.