An incorrect slippage setting is a common reason why Pump.fun trades don’t get copied.
We can confirm if our transaction failed due to slippage % by using tools like Solscan, where viewing the transaction signature reveals if slippage was the cause.
Look for the failed transaction that occurred at the time of the trade. (has a red sign next to it)
Open the transaction and you will see one of the following errors:
"Program Error: "Instruction #4 Failed - custom program error: slippage: Too much SOL required to buy the given amount of tokens"
or
"Program Error: "Instruction #4 Failed - custom program error: 6002 | slippage: Too much SOL required to buy the given amount of tokens"
An example of a failed transaction due to the slippage
Solution: If you are willing to accept a higher price difference and would like to catch these trades regardless, increase the Pump.fun slippage %.
If you are uncertain how much should you increase the slippage %, you can follow these steps: