Automate the calculation of RSI for a list of stocks, and then analyze its accuracy at predicting future price movements. The relative strength index is a momentum oscillator commonly used to predict when a company is oversold or overbought.
The relative strength index is a momentum oscillator commonly used to predict when a company is oversold or overbought. The calculation process is straightforward:
The RSI will then be a value between 0 and 100. It is widely accepted that when the RSI is 30 or below, the stock is undervalued and when it is 70 or above, the stock is overvalued.
The code in this walk-through will calculate the RSI for each stock in a user-defined list of tickers. It will then highlight every crossover in each stock’s historical data and using this information, determine the accuracy of the RSI at predicting future price movements.
I will also touch on the analysis of this technical indicator. Using the algorithm below, we can extract a lot of information about each stock and their likelihood of being accurately predicted by the RSI. For example, we can quantify and visualize which stocks were most successfully predicted using the relative strength index.
The final output of the analysis section in the code below.
A visualization of the observed stocks where color signifies RSI’s predictive accuracy and size is the volume of momentum crossovers. (Image by Author)
In the first picture above, you can get an idea of what the final output of this code’s analysis section will look like. The variables we will be using to judge the RSI’s predictive power can be used to create an ROC curve for further visualization. In the second picture, we can see the list of observed stocks graphed by their respective accuracy and volume of crosses. I will dive further into the insights derived from this code later.
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