Some of the more experienced traders can answer this. If I have a limit order to buy and the price goes low enough to be executed I expect the trade to be executed. It did not, even though the ask price went below my buy limit price. I call and the response was the system, their servers, was down so my order was never activated. Can a broker keep limit orders in teir servers and not send them to the exchange? Hamb
yes, it's called a native vs simulated order. Some exchanges do not accept the same set of native orders. Nasdaq accepts most of them I think. NYSE accepts a few less.