New Tool : Volume , Selling / Buying Pressure ..

honestly have some idea to distinguish the Selling/Buying Pressure on each bar .. and I really hopefully looks for a help to code it ..

How we distinguish and seperate the UP-Ticks from DOWN-Ticks in order to measure the Selling/Buying Pressure on each bar , by drawing such as a Histogram where upticks+downticks = Volume on that bar ?

hope i geo help ..