I want to add some new charting in history

Developers
weiming wu
2011-08-12
2013-03-13
  • weiming wu
    weiming wu
    2011-08-12

    as tittle, I want add some new charting in the stock history map, like Rsi or cci map does.
    It is a volume map. the volume has fixed by some weight
    the formula as below..
    ( ( Close(i-1) - Close(i) + PI ) / ( High(i) - low(i) + PI ) ) * Volume(i)
    where:
    Close(i-1)=Closing price corresponding to time interval (i-1)
    Close(i)=Closing price corresponding to time interval i
    High(i)=Max( HighPrice(i ), Close(i-1) )  : select the higher one.
    Low(i)=min( lowPrice(i) , Close(i-1) ) :  select the lower one.
    PI=Price interval (usually  US $0.01)
    Can any one tell me where to start the work
    thanks…..