Dark pool sentiment measure

When Felix looks at dark pools, he scrolls and eyeballs the current sentiment. It seems easy to create a measure of sentiment at the top of the page. Whether it is just a count of the bullish or bearish labels or whether it should take the size of the position into account I have to leave up to people smarter than me. But at a minimum, there should be a place at the top of the page that lists the bullish/bearish split and the percentages for each.