Forex Course

85. Learning To Trade By Using The ‘True Strength Index’ Indicator


The True Strength Index (TSI) is a technical indicator used to analyze the financial markets. ‘William Blau’ developed the indicator in the mid of 1991. If you are interested to know more about William Blau and the technical tools developed by him, we suggest you read his book – ‘Momentum, Direction, and Divergence.’ The True Strength Index abounds between the +100 and -100 levels, and most of the values fall between +25 and -25.

Typically, the price action moves between these levels, and they are considered as overbought and oversold levels. This indicator also warns the weakening of a trend through the divergence and indicates a potential trend changes via centerline. When the indicator goes above the zero-level, it means the indicator is in positive territory, and the buying market is strong. But if the indicator goes below the zero-level, it means that the indicator is in negative territory, and the selling market is strong.


Below is how the price chart looks when the True Strength Index indicator is plotted on it.

True Strength Index Trading Strategies

Traditional Trading Strategy

Buy Example

We must look for buy trades when the crossover of the TSI lines happen at the oversold levels and hold it until the price action reaches the overbought level. The image below represents a buying entry in the AUD/JPY Forex pair. In an uptrend, when the market gives a decent pullback, the TSI indicator reached the oversold area, which means that the sellers are exhausted now and prepare for the buys. Soon after the exhaustion, the crossover happened on the TSI indicator, indicating a buy trade.

Sell Example

Look out for selling opportunities when the crossover happens at the overbought levels and hold it until the price action reaches the oversold level. The below chart represents the sell trade in the AUD/JPY Forex pair. The TSI indicator reached the overbought level when the price action gave enough pullback; the crossover indicates the failure of buyers to move price action higher, and as a result, reversal happened. We can exit our positions at any of the major support levels, or when the indicator gives an opposite signal.

TSI Breakout Strategy

Buy Example

The strategy is to identify a breakout on the price chart. Once the breakout happens, the TSI indicator must be above the zero-line to take the buy trade. We can see that in the below image when the breakout happened on the EUR/CAD Forex pair. After the breakout, we can see that the TSI indicator was also above the zero line, indicating a buy signal in this pair. We can exit our positions at the higher timeframe’s resistance area or exit when the TSI reaches the overbought area.

Sell Example

In a downtrend, find out a sell-side breakout. After the breakout, if the TSI indicator goes below the zero-line, it indicates a sell trade. As we can see in the image below, when the price action broke the trend line, the TSI indicator also breaks below the zero line, which shows that the sellers are ready to print a brand new lower low in this pair.

That’s about TSI and trading strategies related to this indicator. Make sure to try this indicator and these strategies and let us know hoe did your trades go in the comments below. Cheers. [wp_quiz id=”67291″]


By Reddy Shyam Shankar

I am a professional Price Action retail trader and Speculator with expertise in Risk Management, Trade Management, and Hedging.

Leave a Reply

Your email address will not be published. Required fields are marked *