When I am viewing several tick charts (say 25 tick... 55 tick and 77 tick) what am I seeing as the little bar moves up and/or down? I know it relates to price but exactly how? On a 25 tick chart is the size of the bar the difference between the upticks and the down ticks in the last 25 trades? If one of those trades is for 50 contracts and it ticks down but the other 24 trades all tick up even though they are only for one contract each would the graphic go up? Thanks ~EC PS. Please... don't post pictures of the little blood sucking creatures that live on deer.