evROI for Spin and Go Stats

[Mahren]

evROI for Spin and Go
Spin and Go is a high variance format of poker and focus on prizes line can be frustrated if you doing everything right and your bankroll going sideways or down.
Usefull way how to check if you are just unlucky is anything what can indicate your expected value.
Compare actual ROI is not sufficient way, because of lottery style of this format. Once you hit one of the top three multiplier, your ROI become distorted. And the variance has impact on actual ROI.

On the other hand, indicator like evChips/Tournament, Net Chips Expectation Won, are not affected by variance. They just reflect your ´´skills´´.

So, what Iam more interesting of is evChips/T, evROI and evCurrency Net Won stats. It simply show me, if my expectation is possitve and how big the actual variance is if compare actual ROI and profit.
Losing about 30 or more buy-ins at this format is nothing unusual even with 10% ROI.

I downloaded the code for evROI Spin and Go. The formula is evChips/T + 500 / 1500 * 1-rake * 3….
I will not finish this formula till the end, because is WRONG!
Do not really understand what is the final result/number represent, but definitely not evROI for spin and go..

The correct formula for evROI Spin and Go is here:
2 * (buyin – rake) / 1500 * evChips/T * 100 / buyin

This formula is proven and is simply logic. Return of investment is calculated by count all buy ins we paid compare to net profit we gained. Example 1000usd invest (100 x 10usd buy in) and 100usd profit is 10% return on investment.
If we play 100usd spin, our investment is 100usd, our potencial return is our opponents buyins minus rake, its 190 (100 – 5%fee *2(opponents) = 190. Lets say we go all in with our 750chips left against villain with same stack. We have quads against Air, our Net Chips Expectation Won is 1500. If our potencial profit can be only 190usd, one chip has value of 190 / 1500 = 0,126usd.
We have one tournament done and our evChips/T is 1500. As we won prize pool our actual ROI is 190% and the evROI must be same. Lets back to my formula 2* (100 – 5) = 190 / 1500 * 1500 *100 / 100 is 190% evROI. It look very simply if use 100usd buyin, but its important follow the code.
Lets use the WRONG formula above presented on the internet on a few poker websites and which you can downloaded here as well.
1500 + 500 / 1500 = 1,333 * 1-0,05% rake = 1,26 * 3 = 3,8 – 1 * 100 = 280 ? is not correct.

Here is the correct evROI PT4 code:
((2 * amt_buyin) / (1500)) * (amt_expected_won / cnt_tourneys) * (100) / (amt_buyin + amt_fee)

Enough to coppy and paste. Just open Configure – Statistics and click on New – Definition and paste to value expression. Format type – percentage.

And here is evCurrency Net Won PT4 code:
(cnt_tourneys) * (amt_buyin + amt_fee) / (100) * ((2 * amt_buyin) / (1500)) * (amt_expected_won / cnt_tourneys) * (100) / (amt_buyin + amt_fee)

[potamito]

This formula is proven and is simply logic. Return of investment is calculated by count all buy ins we paid compare to net profit we gained.

This is wrong or you´re confusing regular ROI% with evROI%....when calculating a stat based on EV or as PT4 calls it "adjusted" we have to take into account not the real observed results but the expected or "adjusted" results.

[Mahren]

yes i just explain what is the ROI. The formula for evROI is based on chip adjusted..

[Mahren]

I wanted to remind what ROI is mean, just because of type of example and comparing wrong code with correct one. I could only prove it on example where actual ROI% must be same as evROI and show which code produce the expected number. But as I wrote the evROI formula is ofcause based on EVchip/adjusted chip stats..

[Mahren]

Simplyfied version:
As we want to get opponents chips, we have to convert the chips to usd. For 0,25usd spin it is opponent buyin - rake x2.
0,23 x 2 = 0,46 divided by all chips at table /1500 is 0,00030667 what is value in usd for one chip. Now its pretty simply, check your Net expected chips won number and multiply it by usd value for one chip what is Net expected currency. Last step do get evROI is divided net expected currency by My C Cost (all buy ins paid, its mean our investment) and multiply by 100 to get % of evROI.
Formula is bit different by result is same:
evROIspin
(((2 * amt_buyin) / 1500) * amt_expected_won) / (amt_buyin_ttl_curr_conv) * (100)

My Currency won EVspin
(((2 * amt_buyin) / 1500) * amt_expected_won)

[Mahren]

((((3 * amt_buyin) - (amt_buyin + amt_fee)) / 1500) * amt_expected_won) / ((cnt_tourneys) * (amt_buyin + amt_fee)) * (100)

adjusted formula - it must be a 3 x (buyin) - (byuin+rake)

because if:
Our account is 0,25usd and we pay for one spin our account will be a 0.
3 players pay rake 0.02usd so prize poole is 3 x 0,23 = 0,69usd
so if we win our account will be 0,69usd but we invested/paid 0,25usd.
Its mean our pure profit is 0,69 - 0,25 = 0,44 (and this must be divided 1500 to get value for one chip and so on...)
so sorry for mistake in first formula..