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= RSI−min[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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