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Old 10-24-2007, 08:33 AM   #1
Ganchrow
 
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Default Estimated NHL Over/Under Push Frequencies

For updated data please see my Half-Point Calculator.

Total   N Std. Err. Freq.
5 789 1.556% 25.602%
6 2,296 0.630% 10.148%
7 847 1.424% 21.960%


Methodology:
  • All NHL regular season final scores and closing over/unders (from http://wwww.cover.com/) from the 2005/06 season through October 23rd of the 2007/8 season were analyzed (2,584 games in total) for the push frequencies of various totals.
  • The push frequency for a given over/under was determined by the percentage of games with a closing over/under within 0.5 points of the over/under in question ending with a total equal to that over/under. For example, the push frequency of an over/under of 6 was determined from all games with a closing over/under between 5.5 and 6.5.
  • This is based on Stanford Wong's methodology as described in Sharp Sports Betting.
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Old 02-18-2008, 10:03 PM   #2
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Are you saying that playing for a side with an under 5.5 goals and an over 5 goals would be profitable? Assuming that the juice is less than what %?
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Old 02-19-2008, 02:06 AM   #3
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Quote:
Originally Posted by Munson15 View Post
Are you saying that playing for a side with an under 5.5 goals and an over 5 goals would be profitable? Assuming that the juice is less than what %?
It could be profitable ... it depends on the payout odds offered on each bet (as well as your estimates of the probabilities of the game going over or under 5 -- unless you structure your bets irrespective of these probabilities). The juice is irrelevant.

Assuming you bet to equalize losses if the total lands other than 5 (thus rendering further probability estimates moot), then for a profitable betting opportunity to exist the decimal odds on the over and under must satisfy the following inequality:
du5½  >  do5
do5 - 74.398%


or equivalently

do5  >  74.398% ×  du5½
du5½ - 1
where do5 and du5½ correspond to the decimal odds on the over 5 and under 5½, respectively.

So, for example, if the odds on the over were -110, the odds on the under would need to be at least / ( - 74.968%) ≈ for a profitable half-middle to exist.

Conversely, if the odds on the under were -110, the odds on the over would need to be at least 74.968%* / ( - 1) ≈ for a profitable half-middle to exist.
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Old 02-19-2008, 05:06 AM   #4
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Default

Quote:
Originally Posted by Ganchrow View Post
Code:
Total   N  Std. Err.  Freq.
5      789    1.556%   25.602%
6    2,296    0.630%   10.148%
7      847    1.424%   21.960%
I know nothing of NHL but it seems strange that 5 and 7 should be so much more common totals given the spread total than is 6. What is the explanation for this?

Your text doesn't seem to quote very well.

Last edited by Ganchrow; 02-19-2008 at 05:26 AM.. Reason: fixed HTML table formatting
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Old 02-19-2008, 05:16 AM   #5
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Quote:
Originally Posted by chemist View Post
I know nothing of NHL but it seems strange that 5 and 7 should be so much more common totals given the spread total than is 6. What is the explanation for this?
With the advent of the shootout NHL games can no longer end in a tie score.

Quote:
Originally Posted by chemist View Post
Your text doesn't seem to quote very well.
It's actually an HTML table. For future refernce you can just copy and paste the table data into a pair of [code][/code] tags.
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Old 02-19-2008, 06:20 AM   #6
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Ganchrow, I would like to know if it is possible to calculate the expected total given the o/u lines.
Examples from NHL today:

Boston vs. Carolina 5.5 -109/-101
Philadelphia vs. Ottawa 6 -131/121
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Old 02-19-2008, 06:33 AM   #7
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Quote:
Originally Posted by 3put View Post
Ganchrow, I would like to know if it is possible to calculate the expected total given the o/u lines.
Examples from NHL today:

Boston vs. Carolina 5.5 -109/-101
Philadelphia vs. Ottawa 6 -131/121
No, not without further defining the probability distribution beyond those values given for the 5, 6, and 7.

But just to be clear, is it really the expected total for which you're looking?
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Old 02-19-2008, 08:45 AM   #8
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I am interested in the connection between the puckline and the total in a game.
Obviously in a highscoring game the favorite has a greater probability of winning by at least 2 goals.
Ottawa is the favorite today and the o/u line is 6 -131/121 indicating that the book expect that there will be scored ca. 6.2 goals on average were this game played many times.
That is what I mean by expected total.

I wondered if the push probabilities and the o/u line in combination was enough to calculate this expected total.
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Old 02-19-2008, 09:19 AM   #9
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Quote:
Originally Posted by 3put View Post
Ottawa is the favorite today and the o/u line is 6 -131/121 indicating that the book expect that there will be scored ca. 6.2 goals on average were this game played many times.
That is what I mean by expected total.
Actually an over/under defines a percentile (which would be the median in the case of a balanced market) not an expectation. A line of 6o-131/6u+121 implies that about 55.62% of non-pushed totals will go over 6 and 44.38% will go under, but does not speak to the goals scored on average. In general the average total should be higher than the median total due to the fact that totals can never be less than 1 but have no theoretical maximum value (in other words, scoring distributions are positively skewed).

Quote:
Originally Posted by 3put View Post
I wondered if the push probabilities and the o/u line in combination was enough to calculate this expected total.
As I said, you'd first need to fully define the set of outcome likelihoods (which can be approximated with the push probabilities adjusted for the current line -- this is how the HPC estimates these figures). Once you have a set of outcome likelihoods with which you're satisfied, calculating the expected total becomes a trivial matter of taking the dot product of the vector of totals and the vector of associated outcome probabilities.
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Old 02-19-2008, 10:16 PM   #10
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There's a reason why this kind of info isn't released...
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Old 04-23-2008, 08:31 PM   #11
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Default Just Checking

So, Sir, if I have a sportsbook that likes to post "unconventional" totals on Playoff Hockey games, according to your push frequency calc, I just need better than 3-1 in order to make money?
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Old 04-23-2008, 08:33 PM   #12
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Quote:
Originally Posted by Obioha View Post
So, Sir, if I have a sportsbook that likes to post "unconventional" totals on Playoff Hockey games, according to your push frequency calc, I just need better than 3-1 in order to make money?
Please illustrate your question with a specific example.
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Old 04-23-2008, 08:36 PM   #13
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If one sportsbook hangs up over 4' at -195 and another posts under 5 at -105, that is still a profitable wager?

The reason I ask is because I only take the wager when the odds are approx 4-1, but you might be giving me a fine tuning.

Last edited by Obioha; 04-23-2008 at 08:40 PM..
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Old 04-23-2008, 08:40 PM   #14
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Quote:
Originally Posted by Obioha View Post
If one sportsbook hangs up over 4' at -195 and another posts under 5 at -105, that is still a profitable wager?

The reason I ask is because I only take the wager when the odds are approx 4-1, but you might be giving me a fine tuning.
According to the above probabilities, no, it would not be profitable.

See http://www.sbrforum.com/Betting+Tool...alculator.aspx
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Old 04-23-2008, 08:45 PM   #15
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Ok, got it. Now, do you have any playoff tweaks?
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Old 04-23-2008, 08:49 PM   #16
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Quote:
Originally Posted by Obioha View Post
Ok, got it. Now, do you have any playoff tweaks?
Unfortunately due to the relative lack of data I do not.
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Old 04-23-2008, 09:07 PM   #17
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Sir,

Have you done any work with NHL ties and their relationships to totals? Assuming that a game with a total of 5 is more likely to tie than a game with a total of 7. If that is the case, is 4-1 a good proposition on a regulation tie in NHL game with total of 5, 6, and 7?
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Old 04-23-2008, 09:16 PM   #18
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Quote:
Originally Posted by Obioha View Post
Sir,

Have you done any work with NHL ties and their relationships to totals? Assuming that a game with a total of 5 is more likely to tie than a game with a total of 7. If that is the case, is 4-1 a good proposition on a regulation tie in NHL game with total of 5, 6, and 7?
No, I have not posted anything on this.

To do this you'd need to analyze regulation time-only total scores and then perform much the same analysis as above.
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Old 11-02-2008, 08:48 PM   #19
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Hi,

I'm new to this forum, and I have a question about your half point calculator. Here is my example (I was looking to wager on the over on an NHL game):

Over 5.5 goals -110

Over 5.0 goals -165

My question is, "Using the half point calculator, is it a better value to wager on the Over 5.0 goals than it is to wager on the Over 5.5 goals?"

Thanks in advance!
1capper2008
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Old 11-03-2008, 01:10 AM   #20
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Quote:
Originally Posted by 1capper2008 View Post
Hi,

I'm new to this forum, and I have a question about your half point calculator. Here is my example (I was looking to wager on the over on an NHL game):

Over 5.5 goals -110

Over 5.0 goals -165

My question is, "Using the half point calculator, is it a better value to wager on the Over 5.0 goals than it is to wager on the Over 5.5 goals?"

Thanks in advance!
1capper2008
Over 5 -165 is much better,

See the detailed example at the bottom of the Half-Point Calculator page.

If you have any questions about that please let me know.
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Old 11-10-2008, 03:01 AM   #21
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The half-point calculator seems to assign the same probabilities of score outcomes regardless of the line. That is, if you put in a total of 5, 5.5, or 6, the odds of landing on 5 are still showing as 25.6%. I see the same thing for ATS sides in other sports. Obviously, the odds of the final margin in an NFL game landing on 7 if the spread is 7 are much higher than if the spread is 2. But the calculator shows the same probability in both cases. Is your data simply the average of all past games, or does it take into account the line of the game in question, and only look at historical games with a similar line? Just making sure I understand how it works. Thanks.
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Old 11-10-2008, 06:08 PM   #22
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Yes, Evo, that is correct.

The half-point calculator is a suitable approximation tool when traversing spreads/totals with probabilities "close" to 50/50.
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Old 11-13-2008, 06:05 PM   #23
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Either I don't understand or I don't agree. If an NFL game has a spread of -10, and I want to estimate the odds of the outcome landing on 10, I certainly do not want to look at what pct. of *all* games have historically landed on 10. That number will be much to low.

So I guess I am saying that I don't see how your half-point calculator can be anywhere near accurate enough unless you are looking only at point distributions of "similar" past games. [I am inferring from your pevious answer that you are not doing this].
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Old 11-14-2008, 10:54 AM   #24
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Your inference is incorrect.

Read the methodology briefly outlined in the first post of this thread.

Different sports and spread/total combos use different radii.
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Old 11-15-2008, 05:39 AM   #25
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If this is true, then why would the pct. chance of a 7-point margin of victory show as the exact same number, regardless of the game spread entered into the NFL calculator? It should differ as you change the spread.
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Old 11-16-2008, 02:00 AM   #26
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Quote:
Originally Posted by evo34 View Post
If this is true, then why would the pct. chance of a 7-point margin of victory show as the exact same number, regardless of the game spread entered into the NFL calculator? It should differ as you change the spread.
I'm not sure I understand your points. Have you carefully read the HPC Docs?

If so could you perhaps provide a more precise illustration of your issue?
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Old 03-29-2009, 08:42 PM   #27
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Damn Ganch. Will Hunting calls and wants his brain back

Could you take my GMAT for me?
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Old 03-30-2009, 11:26 PM   #28
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ok, this under over calculator..either im doing somthing wrong or i cant read....im doing last nights nhl results and im not understanding this calculator, someone help me plz
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Old 03-31-2009, 12:37 AM   #29
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Quote:
Originally Posted by PapaGeorge View Post
ok, this under over calculator..either im doing somthing wrong or i cant read....im doing last nights nhl results and im not understanding this calculator, someone help me plz
I'm not sure I exactly understand your issue. Have you carefully read the HPC Docs?

If so could you perhaps provide a more precise illustration of your problem?
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Old 03-31-2009, 12:14 PM   #30
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Devils -1½ +260 -110 Over 5½ +115
Rangers +1½ -320 -110 Under 5½ -135

thats last nights line, what does you calculator offer for this info?
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Old 04-19-2009, 12:46 PM   #31
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forget math just call the game in as under every game from here on out !!!!
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