The Range Expansion Index ( REI ) oscillator is based on Tom Demark's studies and described in "DeMark on Day Trading Options" book.
Range Expansion Index is an oscillator which compares current intraday highs and lows with the high and low of two bars ago.
The indicator oscillates between +100 and - 100, Default overbought and oversold conditions are 45/-45...
![BBVA: [e2] Range Expansion Index](https://s3.tradingview.com/p/pAttqofq_mid.png "[e2] Range Expansion Index")
