Your real day master element by four pillars method is Yin metal but weak.
As far as compatibility of rat sign and horse, it is totally clashing nature.
You have one diety in your four pillars chart, that is "unexpected wealth" in your age group 46 to 55 and 66 to 75. Remember as your element is weak you might either gain or lose money in this period so you have to be careful in all dealings in this period.