There are any number of "strategies" that appear to work. Here's one where you trade commodities based only on the day of the month: https://www.youtube.com/wa

There are any number of "strategies" that appear to work. Here's one where you trade commodities based only on the day of the month: https://www.youtube.com/watch?v=3kNAYC6y0kc https://www.youtube.com/watch?v=3kNAYC6y0kc