400 milliseconds to what, exactly?

A bot advertises 400-millisecond execution. That sounds fast. The useful follow-up is: which part took 400 milliseconds?

Detecting a signal, sending an order, getting an acknowledgement, receiving a fill, and confirming settlement are separate milestones.

Ask for the latency distribution

A best-case number says little about a busy period. Ask for typical performance and the slow tail, along with sample size, region, and measurement method.

A cross-platform system also depends on both venues. One leg can respond quickly while the other stalls.

Speed does not replace matching

The markets still need comparable outcomes, deadlines, and resolution rules. Executing the wrong pair faster makes the mistake arrive sooner.

Track quote age, obtainable size, failed legs, and the cost of unwinding. A fast submission that never fills should not count as a completed opportunity.

Try the failure case

Imagine the first venue accepts an order and the second times out. The bot retries, but the original request may still be live. Without idempotency and position reconciliation, it can create unintended exposure.

The 400-millisecond figure here is a product claim to evaluate, not a verified benchmark. A useful report would show the whole lifecycle under ordinary and stressed conditions.

Fast is a measurement. Profitable is an outcome. Connect them with actual records.

Further reading: Prices and order books · Resolution rules · Current fees.

Explore the markets: Open Polymarket (referral link).