Volume+ (GBPUSD futures)

study("Volume+ (GBPUSD futures)", shorttitle="Volume: GBPUSD futures", overlay=false)
 
Symb  = input(defval="CME:M6B1!", type = string, title="GBPUSD")
 
Transpa = input(30, title="Bar transparency", minval =0, maxval=100)
Inv = input(defval=false, type = bool, title="Invert Horizontally?")
lookback=input(10)
showMA=input(false)
lengthMA=input(20)
 
 
 
Sec=Symb
p2  = security(Sec, period, close)
o2 = security(Sec, period, open)
v2  = security(Sec, period, volume)
//p2=close
//v2=volume
//o2=open
 
 
o1=o2[lookback]
p1=p2[lookback]
v1=v2[lookback]
 
c=      iff(o2<p2 and v2>sma(v2, lengthMA)*1.25, teal,
        iff(o2<p2 and v2<sma(v2, lengthMA)*1.25, teal,
        iff(o2>p2 and v2>sma(v2, lengthMA)*1.25, red,
        iff(o2>p2 and v2<sma(v2, lengthMA)*1.25, red, gray))))
plot(Inv? -v2 : v2, style=columns, color=c, transp=Transpa)
plot(showMA?sma(v2, lengthMA):na, color=maroon)