The term "multi-variety combination" is more general. Are you multi-species hedging or multi-species in the same direction? Therefore, it is not comprehensive to say whether 80% positions are too large. I don't think the so-called position can be generalized. What matters is your trading system. A complete trading system includes fund management. If your system allows 80% positions, then you can trade according to it. On the other hand, if you pay the bill because you are emotional, you'd better lighten your position appropriately. Generally speaking, if there are many varieties in the same direction, it is best not to be too high, and below 70% is more suitable to prevent systemic risks. If you are a multi-variety hedge, then the position size is relatively random.