There's been a really good article about this. Check it out here:
https://blog.bancor.network/beginners-guide-to-getting-rekt-by-impermanent-loss-7c9510cb2f22
This article slippage is also very helpful: https://medium.com/balancer-protocol/calculating-value-impermanent-loss-and-slippage-for-balancer-pools-4371a21f1a86