Fill or Kill vs All or None

My understanding is that fill or kill is usually within a short window. In your example, a FOK would likely go to someone buying all 1 million shares at 21. Where an All or None sell would more than likely take longer and potentially have multiple buyers which would average out to $21 per share. My experience also tells me these actions are more suited for buyers than for sellers. I could be wrong on this and am curious to follow more of this thread

Edit: FOKs happen immediately and AONs have a window. AONs have a longer execution period.

In the old days it would also affect total commission fees.

FOK is immediate and unlikely to affect share price. Typically used for large orders. AON remains on the board and until executed leaving more time to affect pricing.

Fill or kill on a liquid stock seems over kill to limit orders but if you are dipping yours toes into pink sheets can be useful....good luck

I think the main advantage of a FOK is that the order goes away quickly if it doesn't fill. Maybe the person placing the order has an alternate stock to buy if the order doesn't fill immediately.

The main advantage of a AON is that the order can remain unfilled for the rest of the session or longer time period if specified. Maybe the person placing the order is somewhat undecided and therefore is willing to let the limit order go unfilled until they get the better price.

None bro