Thanks gents
Some good info and thought provoking stuff. Thanks for the replies
xitian wrote:
Otherwise overall (after accounting for PC) my gross profits are still down from my peak in 2011..
After Cross matching (XM) was introduced (23rd Nov 2010?)...the next six months produced some massive months...(Notably Jan/Feb 2011), then the profits started to drop back to normal over the following six months. I was surprised (but delighted!) it lasted as long as it did.
Im not sure who was losing, but they must have lost a LOT.
There are times when the market goes haywire for want of a better word. A couple of days a go there were a couple of races at Wolv that seemed to have XM switched off. Having looked at the results Im not so sure. One was a dead heat which is the likely cause.
in that particular race the winner touched 1000 and one touched <1.05. If you do the math, in theory XM shouldn't work above 100 but its another thing in practice.
During the 'boom' months I developed my own version of the kelly criteria that calculated the stake on the fly as the race was in play. It took into consideration the profit I already had greened up plus the what I considered the true odds to be at that split second. (For example if a horse had an avail back price of 30 but was then trading at 1000 with two miles to go, could it really be 1000 to 1? Not in my book. Equally, if two horses are neck and neck with 10 yards to go, would laying at say 1.05 be an appropriate bet? Yes it would, The stake was adjusted and ploughed back in for the next trade within the same race, often placing dozen of bets in seconds etc. I called it "Ratcheting". This was a real defining moment for me.
On one particular profitable system (my sister was running), the stakes ratcheted to over 35 times the initial stake on certain races. NB: Not every race, but when they hit, they hit big. Its not always the most profitable to design a single algo and then apply it to each and ever race, if it is felexible and can adapt to the race in play, then this can add to the bottom line.
From 2012 onwards the frequency of these races where it was possible to Ratchet dropped off.
I too have a pre race trading BOT (its semi automatic rather than fully automatic), Ive had a great deal of satisfaction building that, still work in progress.
Interesting comment from titian about going back to the office too...
Gazuty - Great work. You have a great strike rate and I like the ratio of average win V average loss. Long may it continue for you
What I have found over the years, is that once you develop a profitable initial idea, it leads to further systems. As in the car industry, Its almost like building a chassis and then placing different body types on top, if that makes sense?
At the end of the day , there are only so many variations:-
Back/lay
Lay/Back
A form of bookmaking
A Form of Dutching
This is going to sound a bit obvious, but if you program something to only ever back higher than your lay, no stops and dont trade out for a loss, over a period of time, you will never lose much. from that point its merely a case of refine and repeat.
However there are thousands of variations of the above four. I was running a pre race system yesterday in test mode using a £1000 stake. Out of 18 races, it won 14 and lost on 4. In 3 of the 4 losing races, all three were < £10.
My live in play system still does OK each month. Interesting enough, Ive found my profits have started to increase over the last couple of months as I dont always close the trade now. (ie I enter the market and then dont green up, alternatively, I set the offset to match my expectation of a green (not whats available). If it gets matched, fine, if not, then as gazuty says, it evens itself out over the course of the month). Ive mentioned in other posts that quite often the price is held up in play and only ever comes down if there is the remotes chance of a win. It never used to be like that (Steven 1976 has mentioned this before too). Once you see the pattern, you make a informed decision, easy programmed into the algo
I couldnt agree more than the statement by gazuty - "Developing a winning automation is one of the most deeply satisfying intellectual pursuits I have experienced". I think this is the hook for me. I love the challenge and even if i wasn't making any money from it, I wouldnt be able to walk away from it.
Overall i am surprised that there were only a few who replied. Looking on other forums that use automated betting, its a similar story.
However, onwards and upwards!
