Combine ATR ST

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// This source code is subject to the terms of the Mozilla Public License 2.0 at mozilla.org/MPL/2.0/
// © grv114
study(title="Less volatility", shorttitle="contraction", overlay=true, precision=3)
lenAtr = input(title = "atr length", defval = 1)
atr = atr(lenAtr)
//ATR
avg5 = input(title="WMA", type=integer, defval=5)
avg13 = input(title="WMA", type=integer, defval=13)
avg22 = input(title="WMA", type=integer, defval=22)

WMA5 = wma(atr, avg5)
WMA13 = wma(atr, avg13)
WMA22 = wma(atr,avg22)

ifAtr = atr < WMA5[0] and WMA5[0] < WMA13[0] and WMA13[0] < WMA22[0]

//STD
length = input(20, minval=1)
src = input(close, title="Source")
stdev = stdev(src, length)
STDWMA13 = wma(stdev, avg13)
STDWMA22 = wma(stdev,avg22)
ifStd = stdev[0] < STDWMA13[0] and STDWMA13[0] < STDWMA22[0]

//volume
VWMA5 = wma(volume,5)
VWMA10 = wma(volume,10)
VWMA20 = wma(volume,20)
ifVMA = VWMA5[0] < VWMA10[0] and VWMA10[0] < VWMA20[0]

lessVolatility = ifAtr and ifStd and ifVMA
plotshape(lessVolatility? 1:na,style=shape.triangledown, location=location.abovebar, color=gray, size=size.tiny)