Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

What does it mean “sell on ask” , “sell on bid” in stocks?
Honestly, I wonder if the other answerers aren't overthinking it. Their answers are detailed and correct, but what your coach may be saying is this: When you have bought a stock, on cash or margin, and you are watching it rise you are evaluating when you sell on the price of the stock you are seeing. In reality, you should look at the bid (price buyers will give you for the stock) and ask (price sellers will charge you for the stock) prices. If the stock is going up, odds are the price of the stock is very close to the ask price because it is purchases that are driving it up, but that's not what you're going to get when you sell. You're going to get something around the bid price. If the spread between the two is large (i.e. a volatile stock) this could be many cents or more lower than the ask price. Therefore, what your coach may mean by "Selling on Ask" is you're using the stock price when it's equal or close to the ask price to decide when to sell, instead of letting the stock peak and drop (when its price will approach the bid price) or letting the trailing bid offers catch up to your desired sell point and selling then (i.e. letting the stock point grow PAST your sell point, dragging the bid price up with it). Just a thought, but that sounds like a term a coach would come up with to mean selling and getting less than you thought you were going to from the sale. (I know it's a necro reply, but the Interwebs are immortal and people come via Google... I did)