rvi.strategy

// @version=4
strategy("RVI Strategy", shorttitle="RVI-S", overlay=true)

// User-defined input parameters
length = input(10, title="Length", minval=1)
signalLength = input(4, title="Signal Length", minval=1)

// RVI calculation
numerator = close - open
denominator = high - low

numeratorSMA = sma(numerator, length)
denominatorSMA = sma(denominator, length)

rvi = numeratorSMA / denominatorSMA

// Signal line calculation
signalLine = sma(rvi, signalLength)

// Trading strategy
longCondition = crossover(rvi, signalLine)
if (longCondition)
    strategy.entry("Long", strategy.long)

shortCondition = crossunder(rvi, signalLine)
if (shortCondition)
    strategy.entry("Short", strategy.short)

// Plotting the RVI and its signal line
plot(rvi, title="RVI", color=color.blue, linewidth=2)
plot(signalLine, title="Signal Line", color=color.red, linewidth=2)
hline(0, "Zero Line", color=color.gray)