What Is the Stochastic RSI?


The Stochastic RSI (StochRSI) is an indicator used in technical analysis that varies between zero and one (or zero and 100 on some charting platforms) and is shaped by applying the Stochastic oscillator formula to a set of relative strength index (RSI) values rather than to typical price data. Using RSI values within the Stochastic formula gives traders an idea of whether the current RSI value is overbought or oversold. To put it simply, Stochastics and RSI are based off of price, Stochastic RSI originates its values from the Relative Strength Index (RSI); it is essentially the Stochastic indicator applied to the RSI indicator.


The StochRSI oscillator was developed to take benefit of both motion indicators in order to create a more delicate indicator that is tuned to a specific security's past performance rather than a comprehensive analysis of price change.
The Formulas For the Stochastic RSI (StochRSI) are:

StochRSI= RSImin[RSI]
                   max[RSI]min[RSI]

Where:
RSI = Current RSI reading;
Lowest RSI = Lowest RSI reading over last 14 periods (or chosen lookback period); and
Highest RSI = Highest RSI reading over last 14 period (or lookback period).

How to Calculate the Stochastic RSI
The StochRSI is based on RSI interpretations. The RSI has a contribution value, typically 14, which tells the pointer how many periods of data it is using in its calculation. These RSI levels are then used in the StochRSI formula.
1.     Record RSI levels for 14 periods.
2.     On the 14th period, note the current RSI reading, the highest RSI reading, and lowest RSI reading. It is now likely to fill in all the formulation variables for StochRSI.
3.     On the 15th period, note the current RSI reading, highest RSI reading, and lowest reading, but only for the last 14 period (not the last 15). Compute the new StochRSI.
4.     As each period ends compute the new StochRSI value, only using the last 14 RSI values.
In the next blog will talk about talk about what the StochRSI tells us, how to use it to your advantage and the limitations that it can come with, so stay tuned.







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