Being on the Expert Market makes it easy for the MM's to see everybody's buy and sell orders, so they just start putting them together. The orders don't even have to be for the exact same number of shares. MM's can, say, put two sell orders for 100 shares each together, and trade them with one 200 share buy order. MM's can mix&match and combine orders any way they want until they get the numbers they need to make a trade. This is fun!
News 
Market Data 
Discover 
