Toes should be straight forward when practicing horse stance?

I don't think so. As far as I know, the toes of "Ma bu" or "Ma bu" just look out, which is more in line with the physiological characteristics of the human body. It is also possible that some schools have special requirements for "ma bu" or "ma bu" or "ma bu", and each school has its own characteristics, just like Yongchun's "two-word pliers" sheep and horses, with toes turned inward. It depends on which sect you practice.