DEFINITION of ‘Intraday Intensity Index’
A volume based indicator that depicts the flow of funds for a security according to where it closes in its high and low range.

This indicator was developed by Dave Bostian. Its goal is to track the activity of institutional block traders.

A technical indicator that approximates the volume of trading for a specified security in a given day. It is designed to help track the activity of institutional block traders and is calculated by subtracting the day’s high and low from double the closing price, divided by the volume and multiplied by the difference between the high and the low.

John Bollinger advised to use this indicator as a confirmation tool with the Bollinger Bands.

this indicator is an adaptation for the platform Prorealtime v10.3 of a Tradingview code.

REM INTRADAY INTENSITY INDEX
//@version=3
//developer: David Bostian
//author: KIVANÇ @fr3762 on twitter
////adapted for Prorealtime v10.3 by bolsatrilera-2018

length=21 //"length", minval=1)
K1=(2*close-high-low)*volume
if high <> low then
 K2= high-low
else
 K2=1
endif
INT=K1/K2
INTSUM= summation[Length](INT)
if INTSUM > 0 then
 r=0
 g=0
 b=255
 alpha=200
else
 r=255
 g=0
 b=0
 alpha=200
endif

return INTSUM coloured(r,g,b,alpha)style(histogram)as "INTSUM",0 as "0",INT as "INT"

If price tags the lower BBand, look for IIIX has positive values to enter a trade.
Conversely; If price tags the upper BBand, look for IIIX has negative values to exit.