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Analyzing Mining Stocks With a New Tool


The True Strength Index is an excellent indicator that may help you making better trading decisions. Here's how it works.

John Townsend has been an "on-again off-again" stock market investor/trader for the past 35 years. He has particular fascination with all sorts of indicators and has spent countless hours pondering technical analysis in general. John's passion for gold, miners, and analysis is
a serious hobby, but not a profession. This article originally posted on The TSI Trader.

Are you interested in discovering a new technical tool to use in your analysis of mining stocks? If so, this article may not only interest you, it may also help you make better trading decisions.

I hope you're familiar with the charting capabilities offered at If not, you really owe it to yourself to explore this incredibly rich source of online and real-time charts, portfolio management, and company-specific news.

The main reason I visit this site is that they have my favorite indicator, the True Strength Index. You can select this indicator from a menu of indicators, display it in a lower panel below price, change its colors and parameters, as well as add an indicator to this indicator. This added capability is nice because I add a moving average to the indicator, as I'll show you soon.

The True Strength Index, called TSI for short, is a sophisticated and extremely responsive momentum indicator with very low lag time to response. The indicator was invented by William Blau and designed to give a couple of important interpretive certainties to its user. Namely, when the indicator is rising above zero, price is always rising. And, when the indicator is falling below zero, price is always falling.

Here's an hourly chart of recent Stillwater Mining Company (SWC) price action that I made at In the lower panel are two lines. The True Strength Index (TSI) line is the rose-colored line. The blue line is a three-period moving average of the TSI line itself.

Click to enlarge

On this chart we note that the True Strength Index indicator began falling below zero on June 3 and bottomed a couple hours into June 7. And, price correspondingly dropped from around $12.48 to $11.40.

The white arrows on the right side of the chart pinpoint the area where the indicator was rising above zero. This began a couple hours into June 9 and peaked near the close on the following day. Price during this period rose from $12.30 to $12.80, or so.

Very observant readers have already figured out how a skilled trader could use the rose-colored line as it crossed above the blue line early June 8. It generated a buy signal much sooner that waiting for the zero crossover, and also did a perfect job of crossing back under the TSI when it was most profitable to close the trade at the close on June 10.

Using the signal given by the crossover of the indicator with the moving average, one could have bought Stillwater for $11.40 on June 8 and sold for $12.80 -- holding the trade three days.

Next I'd like to introduce a couple of other ways to interpret the TSI. The following daily chart of Market Vectors Gold Miners ETF (GDX) provides our examples.

First, an effective interpretative tool is to look for divergences with respect to the indicator and price movement. By this I mean, look for an occasion of price making a higher high while the TSI indicator (above zero) makes a lower high. Conversely, look for a setup where the TSI indicator makes a higher low (while below zero) while price makes a lower low.

Second, a breakdown of a strong trend in the indicator is a sure sign to act, as this chart also shows.

Click to enlarge

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No positions in stocks mentioned.

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