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# %B
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This strategy was taken from chapter 5 of [*High Probability ETF Trading* ](https://moshferatu.dev/moshferatu/high-probability-etf-trading ) (2009) by Larry Connors.
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It is based on the [%B indicator ](https://moshferatu.dev/moshferatu/ninjatrader/src/branch/main/indicators/%25b ).
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## Rules
**Long**
1. The ETF (e.g., SPY) must be above its 200-day moving average.
2. If the %B closes < 0.2 for 3 days in a row , enter a long trade .
3. ** (Optional Aggressive Version)** If the %B closes < 0.2 again during the initial trade , enter a second long trade .
4. Exit the trade when the %B closes > 0.8.
**Short**
1. The ETF (e.g., SPY) must be below its 200-day moving average.
2. If the %B closes > 0.8 for 3 days in a row, enter a short trade.
3. ** (Optional Aggressive Version)** If the %B closes > 0.8 again during the initial trade, enter a second short trade.
4. Exit the trade when the %B closes < 0.2.
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