You can repeat the same trigger action over and over, and let me tell you how in this video.
https://youtu.be/34FqysZ8N5QWe will back the first horse in the list and keep placing new bets as soon as the previous ones are matched, each time increasing the bet size by 10%.
You can see the result of such trigger in the video. Naturally, you can add more complexity to it, for example, only bet if the selection is the favourite, or bet if there is at least X amount in your account, but those are topics for some other video.
Download the trigger file here