PVT Formula

[tpresley@xxxx]

Help! I can't get this to work:

The PVT is calculated by multiplying the day's volume by the percent 
that the security's price changed, and adding this value to a 
cumulative total.

PVT = ((close - yesterdays close) / yesterdays close) * volume + 
yesterdays PVT

pvt = (c-ref(c,-1)) / ref(c,-1) * V + ref(pvt,-1);
graph0=pvt;