study(title="Periodic Cumulative Net Volume")
src = close
nv = change(src) > 0 ? volume : change(src) < 0 ? -volume : 0*volume // net volume of positive and negative volume
cnv = sum(nv,10) // cumulative net volume for by perior of 10 use sum; for all use cum
//cnv_tb = cnv - sma(cnv,10) //normalized 10 bars moving average
//plot(cnv_tb, color=(cnv_tb >= 0 ? blue : red), title="CNV", style=area)
plot(cnv, color=(cnv >= 0 ? green : red), title="CNV", style=area)
// Interpretation --> cnv needs to be equilibrium i.e. near to zero after cycle (green, red zone be similar).
//After high Green zone, if value doesn't reach zero, or stay around zero, it indicates demand is active and strong.
// Can be a excellelent indicator for parabolic movements.
// Too much green == demand active active --> rising
// Near zero == accumulation
// Too much red == supply on --> falling