Modified to code from @modhelius and added colors and histogram for easy reading...thanks to him...
What is Relative Strength?
Relative strength is a ratio of a stock price performance to a market average (index) performance. It is used in technical analysis.
It is not to be confused with relative strength index.
To calculate the relative strength of a particular stock, divide the percentage change over some time period by the percentage change of a particular index over the same time period.
How to read this indicator for trading and decesion making?
There are four colors
Aqua: Shows the bullish momentum against the index of your choosing Navy blue: Show the bearish momentum is weakning at the time period Fuschsia : Shows the bullish gaining strength and about to cross zero line Red: Shows the bearish momentum is strong.
Other indicators to be used along with this are 1. Pivot points 2. Moving Average of highs and lows -- 17 period
To take long calls --- There has to be high closing candle above the 17 period moving average of highs and there has to be bullish momentum and ideally with the pivot point as a support
To take short calls -- There has to low closing candle below the 17 period moving average of lows and there has to be bearish momentum and ideally with the pivot point as a resistance.