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With the same idea of the VSA i make the VPSA to make synthetic graph of the price and the volume effect, its easy to see the volume trends. Each instrument have a more clear time frame to see the volume patterns.

Can use others indicators over the VPSA, only write in CAPITAL letters open, high, low, close or hl2 at inputs section.
```//@version=2
study("Volume Price Spread Analysis 1", shorttitle="VPSA")
//Analisis de propagacion en Volumen

/// Values
volumex=log(volume)//*(close>close[1] ? 1 : -1)
V_CLOSE = V_CLOSE[1] > 1 ? ( (close*volumex) + (high*volumex) + (low*volumex) + V_CLOSE[1] ) *0.25 : ( (close*volumex) + (high*volumex) + (low*volumex) + (((close[1]*volumex[1])+(open*volumex))*0.5) ) *0.25
V_OPEN  = (V_CLOSE[1]+(open*volumex))*0.5
V_HIGH = max(max(high*volumex,V_CLOSE),V_OPEN)
V_LOW   = min(min(low*volumex,V_OPEN),V_CLOSE)
V_HL2   = ( V_HIGH + V_LOW ) / 2
senial=input(defval="HL2",title="Signal",type=string)
ploter = ( senial == "CLOSE" ) ? V_CLOSE : ( senial == "OPEN" ) ? V_OPEN : ( senial == "HL2" ) ? V_HL2 : ( senial == "HIGH" ) ? V_HIGH : ( senial == "LOW" ) ? V_LOW : 0
signal = plot(ploter, color=silver, style=circles)

plotcandle(V_OPEN, V_HIGH, V_LOW, V_CLOSE, title='VSA', color = V_OPEN < V_CLOSE ? silver : red, wickcolor=black)
```
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