Following on from Dave Renham's excellent article on creating a tissue (which you can read here), I recorded a video which shows how you can do this using Geegeez Gold. The video is quite long because there is a fair bit to work through, but you can get the gist of it without necessarily watching the middle part (though I recommend you do, of course!).
In this recording I looked at a five furlong sprint handicap at Catterick, and was lucky/good enough to find the winner; but I didn't actually do that well in mimicking the market, as you'll see...
At the end of the video, I compare the prices I came up with against the final starting prices. The overround was 111% whereas my own was closer to 100% allowing for the late non-runner, but still, I have some work to do in getting my odds closer to the market!
Matt
20/7/23: Another example: this time I got the market (more) right but was undone by a pace tear up I didn't predict in terms of the actual result :-/