Why a 20 ms ping can still give you a slow fill
Posted: Sat Oct 31, 2026 11:52 am
Picture the setup. Ping to the broker shows 18 ms, green across the board. Data drops, price jumps, the buy button gets hit, and the confirmation comes back almost half a second later at a worse level. The ping number looked perfect and the fill still felt slow.
Ping measures a tiny packet bouncing off a network endpoint. That endpoint is often a gateway or a load balancer, not the machine that actually decides what happens to an order. A real order has to be parsed, checked against margin, passed through whatever dealing or risk layer the broker runs, sent on to a liquidity source, and then confirmed back. Each of those steps costs time that ping never touches.
There is also the timing problem. Ping gets measured when nothing is going on. During a spike the servers are chewing through a pile of orders from everybody else, and queues form. The same pipe that answers a ping in 18 ms can take far longer to answer a real order right at a data release.
The only honest measurement is the gap between sending an order and seeing the confirmation. Terminal logs usually stamp both events, so the difference can be read straight from the journal. Collect a batch in quiet hours, collect another during busy minutes, and compare. That spread says more about execution quality than any ping figure.
Ping still has a job, mostly for spotting a broken route or a bad VPS. It just says very little about how fast an order gets filled.
Has anyone logged order-to-confirmation times across quiet hours and news releases, and how big was the gap compared with plain ping?
Ping measures a tiny packet bouncing off a network endpoint. That endpoint is often a gateway or a load balancer, not the machine that actually decides what happens to an order. A real order has to be parsed, checked against margin, passed through whatever dealing or risk layer the broker runs, sent on to a liquidity source, and then confirmed back. Each of those steps costs time that ping never touches.
There is also the timing problem. Ping gets measured when nothing is going on. During a spike the servers are chewing through a pile of orders from everybody else, and queues form. The same pipe that answers a ping in 18 ms can take far longer to answer a real order right at a data release.
The only honest measurement is the gap between sending an order and seeing the confirmation. Terminal logs usually stamp both events, so the difference can be read straight from the journal. Collect a batch in quiet hours, collect another during busy minutes, and compare. That spread says more about execution quality than any ping figure.
Ping still has a job, mostly for spotting a broken route or a bad VPS. It just says very little about how fast an order gets filled.
Has anyone logged order-to-confirmation times across quiet hours and news releases, and how big was the gap compared with plain ping?