What prop firms actually monitor
Prop firm challenges are designed to assess whether you can trade profitably within defined risk parameters. From the network perspective, what matters is that your trading session was stable. Prop firms are not looking at your ping time. They are looking at whether your trades occurred normally, your positions were managed correctly, and your drawdown measurements were not affected by technical events outside normal market conditions.
Where this becomes relevant is the disconnect scenario. If your session drops mid-trade and you cannot reconnect quickly enough to manage an open position, that position may hit a stop or reach a drawdown level before you are back online. Whether that outcome gets disputed or simply absorbed by your challenge results depends on the firm's policies — and many firms have strict terms about technical fault claims.
Where most prop firm servers are
FTMO, The Funded Trader, Topstep, Apex Trader Funding, and most other retail prop firms run their MT4 and MT5 challenge environments using infrastructure at or near Equinix LD4 in London. This is the same campus as the major retail forex brokers. Your challenge account's server hostname typically resolves to a London IP. That means the same routing considerations that apply to retail forex trading apply to your prop firm challenge.
If you are outside Europe, the route from your home network to LD4 passes through multiple transit carriers. During peak market hours — the same windows where your challenge is most active — that transit can introduce jitter. A slow reconnect at the wrong moment is not a strategy failure. It is a routing failure, and it is the kind of event that a clean proxy route prevents.
The case for connection stability over raw speed
For prop trading, consistency matters more than raw latency. A challenge trader placing discretionary trades on H1 or H4 charts rarely cares whether the fill arrived in 30ms or 50ms. What they care about is whether the session stayed connected through a volatile morning session, whether the feed froze during an NFP release, and whether a reconnect after network trouble happened fast enough that open positions could be managed.
Those are the network events the priority route is built to reduce. A dedicated proxy route is less likely to drop the session, less likely to produce a slow reconnect, and less likely to show the feed instability that jittery routes introduce. During a challenge where every trading day matters, that stability is the practical advantage.