'ash222' I know I'm late, but, he's correct!
In laymen terms, He's going on what shares were bought at "From the Market", (What you see on the ASK-Side), to what THOSE shares are likely sold at, "To The Market", (What you see on the BID-Side).
There inlies the 200%, as mentioned and as shown in the current L2.
>6^}
Happy Trading!