This indicator reveals the new week opening gaps (NWOG) and new day opening gaps (NDOG) as well as the most recent Regular Trading Hour (RTH) Gap. The NWOG is the gap between Friday's closing price and Sunday's opening price. The NDOG is the gap between the opening price and closing price of the previous day. These gaps can be draws on liquidity as well as general reference points of where the market is and has been.
The RTH gap is the difference between the NY Open price at 9:30AM EST and the previous day's closing price during Regular Trading Hours. This gap can also give you an idea of where the market is headed.