Why scalpers care about latency more than other traders
A swing trader entering a 50-pip move can tolerate 0.5 pips of entry slippage — it is less than 1% of the target. A scalper entering a 3-pip move cannot tolerate 0.5 pips of slippage — it is 17% of the target. The tighter your profit target, the more each pip of slippage costs as a percentage of the expected return. Latency scales the slippage risk directly. A swing trader with 200ms latency is unfazed. A scalper with 200ms latency is fatally disadvantaged. This is why latency-aware infrastructure is not optional for scalpers — it is the foundation of the strategy.
The numbers: 10ms vs 200ms for a scalper
At 10ms RTT: EUR/USD moving 1 pip per second passes 0.01 pip during transit. At 50ms RTT: 0.05 pip. At 200ms RTT: 0.2 pip. These sound small in isolation. Across 10 trades per day targeting 3-pip moves, 0.2 pip entry slippage reduces the expected edge by 6.7% per trade. Over 2500 annual trades: the difference between 10ms and 200ms costs approximately 500 pips in entry quality alone. For a trader working with 0.5R risk per trade on a $10,000 account, 500 pips = $2,500 in lost edge. This is not noise; this is structural cost. See latency vs slippage for the full relationship.
Where latency shows up in scalping: entries, exits, and stops
Entry latency: orders arrive after the price has moved. You aimed for 1.0850; you fill at 1.0853. That is entry slippage eating directly into your 3-pip target. Exit latency: your close order takes time to arrive, potentially turning a profitable exit into a break-even or loss at a fast-moving level. A scalper who usually exits cleanly at the 1.5-pip target instead sees the order arrive to a market that has already moved another 0.5 pips, forcing a worse fill or a miss entirely. Stop-loss latency: in fast markets, stop orders arrive after the price has already moved through the stop level — causing worse fills than the stated stop price. All three are symptoms of the same problem: order transit time. Reducing latency cuts all three bleeding points simultaneously.
What latency target should scalpers aim for?
For retail scalpers: under 50ms RTT to the broker's DC is workable. Under 20ms is good. Under 5ms is excellent. These targets are achievable with a proxy node co-located at the broker's DC, regardless of where the scalper is physically located. Without a proxy, a trader in Singapore connecting to an LD4 broker has 150–200ms RTT — structurally disadvantaged vs. a London trader with 10ms. The gap is permanent and geometric. The scalper in Singapore can outskill the London trader on strategy and risk management, but they start with a 190ms handicap. A TradersProxy node bridges that gap: instead of 200ms to LD4 via direct routing, the Singapore trader gets 5–10ms to SG1, then the proxy routes to LD4 on a private, optimized link.
How to get low latency for scalping
Option 1: VPS near the broker's DC. This helps if the VPS host has good peering to the broker's Equinix facility. Upside: you control the VPS. Downside: you are still routing over the public internet from the VPS to the broker. Option 2: TradersProxy node at the broker's DC. This routes the MT4 SOCKS5 connection directly to the matching engine neighbourhood, regardless of VPS or home location. Upside: optimized private routing, lowest latency, lowest cost per trade. Downside: you depend on TradersProxy infrastructure. Option 3: Co-location. $500+/month for a dedicated server inside the broker's DC. For retail scalpers, a proxy node provides 80–90% of the benefit at a fraction of the cost. See MT4 SOCKS5 setup on Windows for configuration. The economics favour TradersProxy for most retail scalpers.