"Call open" HEM stat

[podbelski]

Does anybody use the "Call open" stat in HEM (I beleive PT3 has smth very similar). And BTW, the "Cold call" stat means the same I beleive?

Googled for it, read some discussions, and still have no clear clue how can I apply it to my decisions.

Example: the player has 21VP/16PFR/3.8%3B and 8 Call open. What does this mean, especially comparing to same VP/PFR/3B but say 4 Call open? Or 12 Call open? Or comparing to 39VP/11PFR/2.2%3B with 23 Call open player?

I have a feeling that stat might be useful, but it's too hard to quickly shed light onto villain's range in certain spot while playing..

[podbelski]

The best I can imagine is the following:

1) 3.8% 3bet, 8% Call open
so, 3bet range is like {TT+,AQs+,AKo}. Then, when he faces a raise he's either folding, 3betting or calling. The latter 2 combine into his playing range when facing a raise, and in total it becomes
3.8 + 8 = 11.8%, this is like {22+,AJs+,KJs+,QJs,JTs,T9s,98s,87s,76s,AQo+,KQo}
He might be inclined to flat with smwat different range, I mean add some broadways but remove low SCs, but it is irrelevant for now.
If the above is true, we need to take his playing range and remove the 3betting hands from it, that will result in hands he flats the preflop open-raises. In this case:
{99-22,AJs,KJs+,QJs,JTs,T9s,98s,87s,76s,AQo,KQo}

2) same stats, but 4% Call open
3.8 + 4 = 7.8, this is like
{22+,AQs+,AQo+}
So, his flatting range will hardly include anything but 22-99 and AQo hands

3) same stats, but 12% Call open
3.8 + 12 = 15.8, this means he flats with majority of broadways and SCs plus low PPs. Harder to nail the range, as he can fold JTo-ATo/QJo+ but flat with many suited gappers etc

4) loose fish:
2.2 + 23 = 25.2, this means he flats all the broadways, all suited aces, 22-QQ, all suited connectors, many suited gappers, some offsuit aces etc


If the above makes sence, the question is how to apply this knowledge quickly while playing a hand?
My best guess is you should rely on this stat when it is really small, like 6% or less, so you can nail opp's range very well.

Bigger number will tell you that the opp plays many playable hands, and that's it by itself. Plus, good players tend to merge their range in proper situations, like flatting with AA etc. This means you can't brainlessly look at numbers, build a range and look how it hits the board. The best you can do is take the stat into minor consideration, do not rely on it in any way.

Very big numbers indicate fish, but this is not too useful in the long run cause you spot fish quite fast by many other things he does, and you know fishes playing all kinds of hands anyway, without additional stats.

PS
it appears you don't need to look at VPIP/PFR when using Call open, what you need is a combo of 3bet+Call open.

[podbelski]

Now I'm thinking of how bad is to have a tiny Call open stat... To be less exploitative, you need either to 3bet all the raises (or fold obv), or to merge your calling range with many different hands

[urbansprawler]

Cold-call or Call open (called CC to distinguish it from CO opening frequency) is one of the most useful stats you can use and it's the third on my HUD. I definitely love it and tells you so much about your villain's range. It comes particularly useful when you raise in LP and someone in the blind calls you. By looking at their 3-bet and call-open stats, you get a decent picture of their range very quickly.

[podbelski]

But what your exact thought process when you taking this stat into consideration? Example?