Here we have another set up in the AUDUSD pair. Look for a long entry in a smaller time frame or simply enter once the 1-3 line is broken and the bar/candle closes above the 1-3 line.
Another thing I look for before I enter the long/short is a completion of an pattern. To distinguish point 'a' I look for the lower high created after point 2(or higher low if going in opposite direction) and draw that line to point 3. I then clone that line and place it on point 4. This typically will give you a good indication of where price will likely visit and where you can look to strike.
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For more information on Geo's Off-Set Rule visit: https://www.tradingview.com/u/4xForecaster/