Cueing Off Support And Resistance Levels

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//  Copyright by HPotter v1.0 25/08/2014
// Cueing Off Support And Resistance Levels, by Thom Hartle 
// The related article is copyrighted material from Stocks & Commodities.
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study(title="Cueing Off Support And Resistance Levels, by Thom Hartle", overlay = true)
width = input(2, minval=1)
xHigh = security(tickerid,"W", high[1])
xLow  = security(tickerid,"W", low[1])
plot(xLow, color=green, title="S", style = circles, linewidth = width)
plot(xHigh, color=red, title="R", style = circles, linewidth = width)