How do I accurately calculate slippage if the crypto coin is volatile?

You can accurately calculate slippage for a volatile asset by using a guaranteed stop and limit order. Since an order with a guaranteed stop is processed at the expected price, the slippage risk is mitigated. But you will incur a premium linked to the guaranteed stop when activated. A limit order can help reduce the risk of slippage when investors enter a trade or seek to benefit from a successful trade.

When a limit order is initiated, it will be filled at the expected price or one that slightly differs. This means the execution of a sell order occurs at the set price or a closely similar price, while the execution of a buy order happens at the excepted price or a closely similar range.