You can use the built in methods from the programmer mode. Set up your strategy as you want it to be and set your start bet to the miminum you want the bot to be able to bet. Set your nextbet to what you want it to start at outside of the dobet function, then inside of the dobet function just use nextbet=dAlembert(win). Just check the casing for the function n the methods/functions box in the bot.

so your script would look something like

Alternatively, you can write your own version of dAlembert in the programmer mode