The lay tool allows you to place a bet of a specific size at a specific price at an exact time. You can set it to say lay £50 @ (any price) and then set the hours, minutes and seconds before OR after the start of the event.
Using the Drip Feed Tool, we submits a £50 lay on a horse, which drip feeds into the market at £5 stakes every 5 seconds. The drip-feed tool is a way of getting big bets into the market without shocking the market with a large single bet.
The Stop Entry tool can be used several ways. It can be used to back a price lower than its current price, should it get there. An example may be you want to back Team A at 1.50 should they reach that price. They may currently be 3.00 and you only want to back them when they look certain to win the match