Today's Horse Racing
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u wot m8?
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- northbound
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for calculating Dutching, you definitely need to use the runner's book%, rather than odds. Your intention obviously being to cover as wide a range across the book as possible but still leave a little juice for a decent profit. I'd refactor to book, it's pretty easy (100/ decimal odds for each runner).northbound wrote: ↑Wed Aug 22, 2018 3:42 pmThis is just an experiment to view if there are certain kinds of races where it's possible to dutch all selection at X% higher and get matched on all of them before the off.
Book% would confuse me as I mostly think in odds.
[edit] - so your final calculation should take the TOTAL book% somewhere between 70 and 80 ish percent, if you've ascertained that the runners contained in that selection have got legs!!
Last edited by jimibt on Wed Aug 22, 2018 3:49 pm, edited 2 times in total.
Irish raider.
- northbound
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Interesting stuff, jimbit. I'll look into it.jimibt wrote: ↑Wed Aug 22, 2018 3:46 pmfor calculating Dutching, you definitely need to use the runner's book%, rather than odds. Your intention obviously being to cover as wide a range across the book as possible but still leave a little juice for a decent profit. I'd refactor to book, it's pretty easy (100/ decimal odds for each runner).
[edit] - so your final calculation should take the TOTAL book% somewhere between 70 and 80 ish percent, if you've ascertained that the runners contained in that selection have got legs!!
I'd suggest adding another column with a percentage formulae to compare implied chance of winning rather than solely taking one price divided by the other and deducting 1.
e.g. for the max price on Roaring Lion it'd be (1/4.6)/(1/4.1) = 2.65% change rather than 12.2%
and for example a price of 40 contracting to 20 will produce 2.5% rather than 100%
also keep in mind that a move from 4.6 into 4.1 produces 12.2% profit whereas a move from 4.1 to 4.6 produces 10.9% profit due to the difference in hedge prices
if you ever get to working with more advanced formulae, or want to brainstorm ideas with me, you're welcome to hit me up
correct -but also more simply, if book% is used, those numbers can merely be subtractd from one another to display the percentage change, i.e. if transforming to book%:eightbo wrote: ↑Wed Aug 22, 2018 4:04 pmI'd suggest adding another column with a percentage formulae to compare implied chance of winning rather than solely taking one price divided by the other and deducting 1.
e.g. for the max price on Roaring Lion it'd be (1/4.6)/(1/4.1) = 2.65% change rather than 12.2%
and for example a price of 40 contracting to 20 will produce 2.5% rather than 100%
also keep in mind that a move from 4.6 into 4.1 produces 12.2% profit whereas a move from 4.1 to 4.6 produces 10.9% profit due to the difference in hedge prices
if you ever get to working with more advanced formulae, or want to brainstorm ideas with me, you're welcome to hit me up
4.6 odds => (100/4.6) = 21.74%
4.1 odds => (100/4.1) = 24.39%
difference therefore is 24.39-21.74 = 2.65%
- northbound
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Well, it all depends on what you're looking to do with the figures. If you're looking for back to lay angles, I would argue that 100% is more helpful than 2.5%, as the former shows me straight away that I could double my stake. It would actually be 50%, not 100%.

This is a good point but again, my initial thought into producing these visuals was simply: in how many races I can simply setup a Guardian bot 10min from the off, back all selections at 5% higher than their current odds, and get matched on all of them before the race starts?
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Makes you wonder who still bothers try to get matched in the mornings on a run of the mill meeting. Just a few quid sends the market wild!
Maybe those who have figured out how to capitalize on that wildnessinvisiblelayer wrote: ↑Wed Aug 22, 2018 4:34 pmMakes you wonder who still bothers try to get matched in the mornings on a run of the mill meeting. Just a few quid sends the market wild!
I said add an additional figure, not replace your existing onenorthbound wrote: ↑Wed Aug 22, 2018 4:23 pmI would argue that 100% is more helpful than 2.5%, as the former shows me straight away that I could double my stake.
incorrect. a move of 40 to 20 would most certainly be 100%...
(100*20)/20 = 100
where (<stake>*<difference in odds>)/<hedge odds> = <profit b4 comish>
...only trying to help, there is no need to defend yourself, i'm contributing to your ideas, not attacking or criticising them
- ruthlessimon
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- northbound
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No worries, I was just debating, am not angry

At the end of the day it all comes down to the angle from which you look at things and how you use the figures you produce.
If we all looked at things from the same angle, we would be fighting for a share of the same pie, wouldn't we?
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Should of said sends the graphs wild, literally peanuts matched make this happen as in that graph all over the shopJukebox wrote: ↑Wed Aug 22, 2018 4:39 pmMaybe those who have figured out how to capitalize on that wildnessinvisiblelayer wrote: ↑Wed Aug 22, 2018 4:34 pmMakes you wonder who still bothers try to get matched in the mornings on a run of the mill meeting. Just a few quid sends the market wild!