Intraday Intensity Index Indicator measures the volumes according to the position of the closure within the variation between the minimum and maximum of the session.

It was developed by David Bostian, this indicator, when included in a daily graph, can be seen as providing different information on price trends compared to other indicators such as On Balance Volume.


The Intraday Intensity seeks to solve the significant simplification brought about by the On Balance Volume in attributing volumes completely upwards or downwards according to the closing level compared to the previous closing.


David Bostian‘s indicator starts from an assumption: the preponderance of upward or downward forces will determine the position of the closure within the range between minimum and maximum.


It will then be determined:

The underlying assumption of the Intraday Intensity is correct, but it is also affected by a simplification: the course of a session can be influenced by different phases.

In which the upward and downward functions can alternately take over.

It is not known, in a single daily bar, on which fronts the largest volumes are generated, while the closing level could be the result of the final movement achieved with lower volumes.


With the technical analysis of the indicator, however, we are closer to reality than with the On Balance Volume.


Intraday Intensity Index Indicator calculation formula

The standard and standardized versions of the Intraday Intensity index exist.


Standard version


Where: C = Closing price; H = Maximum of the session; L = Minimum of the session; V = Volumes exchanged in the session.


The portion of the formula:

 2 x C – H – L

achieves the purpose of identifying the closing level, purging it of the upper and lower limit determined by the maximum and minimum seating;

while the denominator portion:


serves to relate the closure within the variation between maximum and minimum. The result will then be multiplied by volumes.


It will be equal to +1 when the closing is equal to the maximum and then add the volumes;


will be -1 when the closing is equal to the minimum and then subtract the volumes;


will be 0 when the close is in the middle of the range and will therefore disregard volumes.


Other nuances can also occur naturally:


The Intraday Intensity Index will then be built at 21 days, or with a different time window depending on the needs of each analyst.


Normalized version

There is also the normalized version of this indicator, which is obtained by dividing it by the sum of volumes and then multiplying x 100; the result at this point will be an oscillator that assumes values ​ ​ between +100 and -100.


The formula for the standard 21-period indicator is:

IInorm = (IIstd / S21 V) x 100

In this case, it may be useful to display the normalized indicator as a histogram.


How to use the Intraday Intensity Index Indicator

The Intraday Intensity indicator is used to detect divergences:


The functioning of the differences in volumes is different from those examined on prices, for example in the Momentum index, where the rate of price rise or fall was measured.

Differences in volumes are based on the fact that in the phases of trend exhaustion volumes also tend to decrease, confirming the low conviction.


Intraday Intensity Index Indicator for TradeStation and MultiCharts

Finally, we are talking about the Intraday Intensity Indicator for TradeStation and MultiCharts.traday Intensity Indicator TradeStation


Intraday_Intensity = ( (Close * 2) – High – Low ) / ( ( High – Low ) * Volume );

Intraday_Intensity_Index = summation(Intraday_Intensity, 21);

Plot1 ( Intraday_Intensity_Index, “III”, White);


Generally, we like the volume-based indicator. For example, we developed the Chaikin Money Flow in this article.

Volume indicators should give you a better perspective. You can discover what knowledgeable financial professionals are doing.

The Intraday Intensity was born to overcome the limitations of other volumes indicators.

Unfortunately, the Intraday Intensity examines only the end of day volumes. We don’t know what intraday movement has been supported by high volume.

To sum up, we use rarely this indicator and we never use it alone.

There are other volumes based indicators: VWAP, Positive and Negative Volume Indexes, On Balance Volume and Chaiken’s Money Flow.



You can learn more about this indicator, reading these resources:


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