//@version=5
indicator(title="Net Volume", format=format.volume, timeframe="", timeframe_gaps=true)
var cumVol = 0.
cumVol += nz(volume)
if barstate.islast and cumVol == 0
runtime.error("No volume is provided by the data vendor.")
nv = math.sign(ta.change(close)) * volume
plot(nv, color=color.blue, title="NV")
Overview
Net Volume multiplies each bar's volume by the sign of the close-to-close change, so a rising close is positive and a falling close is negative. The result is drawn as one blue series titled NV. On the last bar it checks cumulative volume and raises a runtime error when the vendor supplies no volume. There are no inputs, alerts, or trade signals.
Third-party code. ForexR did not write, test or endorse this script, and the summary above was generated automatically from its code and README. Indicators describe the past, and a strategy's backtest can look better than live trading, especially when a script repaints. Check it in the Strategy Tester and on a demo account before you rely on it.
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