First-come, first-served (FCFS) sequencing means a network's sequencer orders transactions by when they arrive, not by how much gas each one pays.
Robinhood Chain uses FCFS
Robinhood Chain's documentation says the chain "utilizes a first-come, first-served sequencing model, where the order is determined strictly by the arrival time at the sequencer", and that "no transaction can bypass others by paying higher fees." Transactions go straight to Robinhood's sequencer rather than sitting in a public mempool where other traders could watch and outbid them.
What it means for memecoin traders
- You can't buy your way to the front. A higher gas price won't get your buy in ahead of others.
- Classic gas-bidding sandwich attacks are harder, because nobody can pay to jump ahead of your transaction. It isn't a full shield, though. In September 2026 Bitquery documented bots front-running thousands of app orders that leaked off-chain through a third-party routing service.
- Being early is about information, not fees. Getting a transaction in first depends on sending it first. So the edge shifts to finding and checking tokens before others do.
- Latency still matters for bots that race to reach the sequencer first. Snipers haven't gone away, but they compete differently.
Read the full FCFS guide.
Educational content only. Not financial advice.