MT4 and MT5 quietly let you choose between execution models that behave very differently under the same network conditions, and most traders never look closely at which one their account actually uses. The setting matters more than it seems, because it determines whether a slow connection shows up as a requote you have to manually accept, or as silent slippage you only notice later when you check your trade history.
Here is what each model actually does, and how a VPS changes the outcome for each.
Instant Execution
Instant execution is the traditional dealing-desk model. When you send an order, the broker’s server checks whether the current price still matches the price your terminal quoted when you clicked. If it does, the order fills. If the price has moved beyond the broker’s tolerance in the time your request took to arrive, the server sends back a requote instead of a fill, asking you to accept the new price or cancel.
This model makes latency visible in a specific way: as requotes. A slow connection does not usually mean you get a worse fill silently — it means you get asked to confirm a new price more often, which is annoying and can cost you the trade entirely if you hesitate or the market keeps moving while you decide.
📊 Key Stat: On a fast-moving pair during a news release, a connection running 100ms+ round trip can see requote rates several times higher than a connection running under 5ms, simply because the price has more time to move past tolerance before the order arrives.
Market Execution
Market execution removes the requote step. Instead of asking you to confirm, the broker fills your order at the best price currently available, whatever that turns out to be. There is no confirmation step, which means the order always fills (assuming there is liquidity), but the price you get can differ from the price you saw when you clicked. That difference is logged as slippage rather than surfaced as a requote.
This is the more common model for STP (straight-through processing) and no-dealing-desk accounts, and it is what most ECN-style brokers describe when they say “no requotes.” The absence of a requote does not mean the absence of a latency cost — it just means that cost shows up as slippage in your trade history instead of an interruption in your terminal.
⚠️ Warning: “No requotes” is sometimes marketed as if it means “no latency sensitivity.” It does not. A market-execution account on a slow connection still absorbs worse fills during fast markets — it simply does so silently, without asking your permission first. Checking your actual fill prices against your intended entry is the only way to see this cost directly.
Exchange Execution
Exchange execution, most commonly associated with true ECN accounts and futures/exchange-traded instruments, routes your order into an actual order book where it matches against other market participants’ resting orders, rather than against a broker’s own pricing engine. This is the model used by genuine ECN forex accounts and by futures platforms like NinjaTrader connecting through Rithmic or CQG.
Latency matters most acutely here, because you are competing directly against other participants’ orders for the same liquidity at the same price level. A slower connection does not just risk a worse fill — it risks missing the fill altogether if faster participants take the available liquidity first.
📊 Key Stat: On exchange-routed instruments, orders are typically matched in price-then-time priority. Two orders at the identical price are filled in the order they arrive. A few milliseconds of latency disadvantage can be the entire difference between getting filled and getting skipped when liquidity at your price level is thin.
How a VPS Changes Each Model
A colocated VPS reduces the same underlying variable — network transit time — regardless of which execution model your account uses, but the visible effect differs:
- Instant execution: Fewer requotes, because your order more consistently arrives while the price is still within tolerance.
- Market execution: Tighter, more consistent slippage, because the price has less time to move between your click and the fill.
- Exchange execution: Better fill probability at your intended price level, because you are competing more effectively for the same liquidity against other participants.
None of these outcomes change your broker’s underlying spread, commission, or liquidity depth. A VPS narrows the execution gap between the price you see and the price you get; it does not change the price itself.
Which Execution Model Should You Actually Care Most About VPS Latency For?
If you are unsure which model your account uses, check your account type documentation or ask your broker directly — most brokers state this clearly for each account tier (Standard, Raw, ECN, Zero, etc.).
💡 Tip: As a rule of thumb, tighter-spread account tiers (Raw, ECN, Zero) are more latency-sensitive than wider-spread standard accounts, because the broker’s pricing already assumes you are trading close to the matching engine. Running a Raw or ECN account from a home connection several thousand miles away undermines the entire reason to choose that account tier in the first place.
Recommended FXVPS Plan by Execution Model
Core Plan ($29/mo) is sufficient for instant or market execution accounts running a single terminal — the primary benefit here is consistent, low-latency network transit, which does not require heavy CPU or RAM resources.
Pro Plan ($39/mo) fits traders running market-execution accounts with multiple EAs, where CPU headroom prevents internal processing delay from adding to network latency.
Scaling Plan ($79/mo) is the right tier for exchange-execution and true ECN traders, particularly anyone running high-frequency strategies where every millisecond of both network and processing latency compounds against order-book competition.
Frequently Asked Questions
How do I find out which execution model my account uses?
Check your broker’s account type documentation, or open your MT4/MT5 account properties within the terminal, which typically lists the execution mode directly. If it is unclear, ask your broker’s support team — this is a standard question they should be able to answer immediately.
Does a VPS help more with instant execution or market execution?
Both benefit similarly in terms of underlying latency reduction, but the visible symptom differs: instant execution shows the improvement as fewer requotes, while market execution shows it as tighter, more consistent slippage.
Is exchange execution only for futures traders?
No. Genuine ECN forex accounts also use exchange-style execution, routing orders into a shared order book rather than through a broker’s own pricing engine. It is most commonly associated with futures and CFD-on-futures platforms, but not exclusive to them.
Can I change my execution model without switching brokers?
Sometimes. Some brokers offer multiple account tiers with different execution models under the same login structure, letting you open a second account type without a full broker switch. Check your specific broker’s account options.
Related Reading
- Slippage and Requotes: How VPS Latency Actually Affects Your Order Fills — the mechanics behind what this guide covers by execution model
- VPS Latency: What “London Server” Really Means — verifying the actual server your orders route through
- Scalping and High-Frequency Trading on VPS — where execution model differences matter most acutely
- Dedicated Cores vs Shared vCPU: What Traders Need — how CPU allocation affects processing-side latency