Correlation odds movement question....

[Ryanolifelix]

If a particular horse is being backed, what decides what horse prices will move in correlation? Is it evenly spread?

So I mean if a horses price moves by 50 percent, is that 50 percent divided into the rest of the horses evenly or does it effect particular horses?

what chooses and why?

Thanks. Ryan.

[Derek27]

If a particular horse is being backed, what decides what horse prices will move in correlation? Is it evenly spread?

So I mean if a horses price moves by 50 percent, is that 50 percent divided into the reat of the horses evenly or does it effect particular horses?

what chooses and why?

Thanks. Ryan.

The people and bots that are trading will decide. For example, if a favourite is trading at 4.0 and somebody places a massive bet taking the price down to 2.0, cross-matching will initially move the other prices out, and that will depend on how much money is waiting for each horse. But after that it's entirely up to traders and bots to decide where they place their bets.

[Trader724]

It is not evenly spread among all horses in the market. It depends on several factors, including the volume and size of bets being placed, the liquidity of the market, and the overall market sentiment. Horses with more liquidity, i.e. more money being traded on them, are likely to have smaller price movements compared to horses with less liquidity. The prices are influenced by the overall demand and supply for each horse.

[napshnap]

Check out this viewtopic.php?p=151567#p151567
As for correlation as certain statistical TA instrument - collect some data and check it yourself, it's not so hard.