Why your fill time doesn't match the moment you clicked

[Fairman]

Why your fill time doesn't match the moment you clicked

If you compare your trade history with the moment you clicked, the times often don't quite match. The platform might show a fill a second or two after you clicked, or a time that seems off by hours. Usually there's a simple explanation.

The hours difference is almost always time zone. MT4 and MT5 show broker server time, which is often two or three hours ahead of UTC. Your clock is local. That one is easy once you know.

The seconds difference is about execution. Your click becomes a request that travels to the broker's server, gets processed, maybe routed to a liquidity provider, and comes back as a fill. The timestamp on the trade is usually when the server processed it, not when you clicked. On a normal day that's a fraction of a second. In fast markets or with a slow connection, it can be longer.

Why it matters for scalpers: if your fills are consistently late, the price you get will often be worse than what you saw when you clicked. That's slippage, and it adds up.

You can measure it roughly by noting the click time and comparing with the fill time over a few dozen trades. If you trade from a VPS, the delay should be smaller than from home.

[PTScalper]

Why your fill time doesn't match the moment you clicked

If you compare your trade history with the moment you clicked, the times often don't quite match. The platform might show a fill a second or two after you clicked, or a time that seems off by hours. Usually there's a simple explanation.

The hours difference is almost always time zone. MT4 and MT5 show broker server time, which is often two or three hours ahead of UTC. Your clock is local. That one is easy once you know.

The seconds difference is about execution. Your click becomes a request that travels to the broker's server, gets processed, maybe routed to a liquidity provider, and comes back as a fill. The timestamp on the trade is usually when the server processed it, not when you clicked. On a normal day that's a fraction of a second. In fast markets or with a slow connection, it can be longer.

Why it matters for scalpers: if your fills are consistently late, the price you get will often be worse than what you saw when you clicked. That's slippage, and it adds up.

You can measure it roughly by noting the click time and comparing with the fill time over a few dozen trades. If you trade from a VPS, the delay should be smaller than from home.

Hi Fairman,

The Hours Difference: Server Time Zones

Trading platforms like MT4 and MT5 do not read the clock on your local computer or phone. Instead, they record the exact time the trade was registered on the broker's trade server.

Most forex and CFD brokers set their servers to Eastern European Time (EET), which is UTC+2 (or UTC+3 during daylight saving time). This specific time zone is used so that the platform's daily candlestick charts perfectly align with the 5:00 PM New York market close. This ensures there are exactly five full daily candles per week, preventing the creation of a tiny, distorted "Sunday candle" when markets reopen. If you are trading from London, Tokyo, or New York, the time stamped on your trade will always be offset by your geographic difference from the broker's designated server time.

[PTScalper]

The Seconds Difference: Execution Latency

When you click your mouse, the trade isn't instantly active. Your click generates a data packet—the order request—that must physically travel across the internet, be processed, matched, and confirmed.

The timestamp you see in your history is generated only after the broker's server receives confirmation from the liquidity provider that the order was officially filled. In fast, volatile markets (such as during a major macroeconomic news release), liquidity providers may reject the initial price due to lack of volume, forcing the broker to search the order book for the next available price. This secondary routing takes extra time, turning a normal 50-millisecond fill into a noticeable 1- or 2-second delay.

[PTScalper]

Why It Matters for Scalpers (Slippage)

For long-term swing traders, a half-second execution delay is irrelevant. For scalpers, it is the difference between profit and loss. During the brief latency window between your click and the server's final fill, the live market continues to move. If prices are moving rapidly, the exact price you saw when you clicked will no longer exist by the time your order reaches the server, resulting in a worse entry price known as slippage.

[PTScalper]

The difference between A-Book and B-Book execution comes down to who takes the other side of your trade and how the broker generates revenue. This structural difference directly dictates how your orders are filled, the speed of execution, and the type of slippage you experience.

Here is the fundamental breakdown of the two models.

[PTScalper]

A-Book (STP / ECN Execution)

In an A-Book model, the broker acts purely as an intermediary. They route your orders directly to external Liquidity Providers (LPs) such as tier-1 banks, hedge funds, or an Electronic Communication Network (ECN) pool.

Revenue Source: The broker makes money exclusively through a fixed commission per lot or a slight markup on the spread. They do not profit from your losses.

Conflict of Interest: None. The broker wants you to win and trade higher volumes because they earn more commissions.

[PTScalper]

B-Book (Market Maker Execution)

In a B-Book model, the broker acts as the counterparty to your trade. Your order never leaves the broker's server. If you buy 1 lot of EURUSD, the broker sells 1 lot to you internally.

Revenue Source: The broker profits directly when you lose a trade. If you win, the broker pays your profit out of their own pocket.

Conflict of Interest: Extremely high. Because the broker loses money when profitable traders succeed, there is an inherent financial incentive to interfere with execution.

[PTScalper]

How Execution Models Affect Fills and Slippage

For high-volume scalping and automated trading, the backend execution model drastically changes the behavior of your fills.

1. Slippage Symmetry

A-Book: Slippage is dictated by true market liquidity. It is symmetrical. If a news event causes a price gap in your favor, you will receive positive slippage (filled at a better price). If the market moves against you during the milliseconds it takes to route the order, you experience negative slippage.

B-Book: Slippage is often asymmetrical. Because the broker controls the internal pricing feed, they can use dealer plugins (like the infamous MT4 Virtual Dealer Plugin) to artificially delay execution. If the price moves in your favor during the delay, they fill you at the worse requested price. If it moves against you, they pass the negative slippage onto you. Positive slippage is rarely, if ever, passed on to the trader.

[PTScalper]

2. Requotes and Rejected Orders

A-Book: Requotes do not exist in a true ECN/STP environment. Your order is executed at the next best available price in the LP's order book. During extreme volatility, your order might be filled partially at multiple price levels (Volume-Weighted Average Price), but it will be filled.

B-Book: When the market moves fast, B-Book brokers often issue a requote—a pop-up asking if you accept a new, worse price. By the time you click "Accept," the price has often moved again. This allows the broker to avoid taking the other side of a trade during dangerous momentum spikes.

[PTScalper]

3. Execution Latency

A-Book: Because the order must physically travel from the broker's server to the LP's server via a FIX API cross-connect, there is a natural processing latency (usually 1 to 5 milliseconds on a co-located VPS).

B-Book: Execution can technically be instantaneous (under 1 millisecond) because the matching happens entirely inside the broker's own server CPU. However, if a trader is consistently profitable, B-Book brokers frequently apply artificial execution delays to their specific account to disrupt high-frequency scalping strategies.