Another TSI Technique to Generate Buy/Sell Signals

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Another technique to generate buy/sell signals using the True Strength Index indicator (TSI) is to trade breaks of the indicator's trend line.
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This chart shows 3 previous SP-500 trades generated by this technique, and suggests that a possible 4th trade signal could be generated today.  
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Alternatively, if the current test of this trend line fails today, this technique then suggests that more time will be needed for price and the indicator to regroup before trying the break through again.
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Click on the chart to ENLARGE