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Yohaku
10/23/2026 18:30
Release： 10/23/2026 18:30
Update： 10/23/2026 18:30
Yohaku
Investment style : Day Trade
Investment career : More than 10 years
Investment amount : 5 million - 10 million JPY
We do not build tools to predict the market. We are creating MT4/MT5 tools to reduce trading effort and mistakes, such as lot sizing, migrating to MT5, and monitoring restarts. All of these are things I thought would make trading easier when I was actively trading FX. Tools that handle signals determine only from confirmed bars, and before issuing, they are verified through automated testing and continuous operation on a demo account.
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There are cases where a contractor's “tick value” is unreliable: an example estimating a GOLD loss of 1/1,580

I’m Yohaku, creating MT4/MT5 indicators and handy tools. What I make is decided from the complaints that come up in GoGoJuan reviews and questions.

You often hear the claim that “lot calculations don’t match when GOLD is used.” There are several causes, and I’ve written about contract size (the size of 1 lot) in another article. This time, I’ll discuss one more cause: the “tick value.”

First, the conclusion

  • The tick value that MT4/MT5 receives from the broker may not be converted into the account currency (yen).
  • If you trust this value to calculate losses or lots, you may underestimate GOLD losses, causing the lot size to become too large.
  • By comparing the values shown in the specification screen with manual calculations or by using a tool that derives it from the broker’s calculation formula, you can notice the discrepancy.

What tick value is, and what it represents

Tick value is the profit or loss per one lot when the price moves by the smallest increment (tick).

When determining the lot size from maximum allowable loss, many tools use this value. They compute the lot as “stop loss width ÷ loss per 1 lot.” Therefore, if the tick value is off, the lot will be off as well.

Ideally, this should be quoted in the account currency. For a yen account, it would display as “◯円.”

What happened on my real-time demo account

On October 7, 2026, I checked GOLD (XAUUSD) on a MT5 demo account (yen account).

The broker’s tick value remained at “0.1 yen.” The correct value should be about 158 yen. In other words, a discrepancy of about 1,580 times.

Using a tool that determines lot size from this tick value would estimate GOLD losses as only 1/1,580 of their actual value. Since losses appear nearly nonexistent, trying to fit them within the same allowable loss would force the lot size to become very large.

Meanwhile, the broker’s calculation formula (OrderCalcProfit in MT5) yielded the correct profit and loss. A self-made tool that estimates the P&L for GOLD when 1 dollar moves per lot matched the manual calculation: 15,837 yen, consistent with contract size × tick width × yen conversion rate. The calculation method was correct.

Why does this discrepancy occur

GOLD is a symbol whose profit and loss are determined in dollars. To use it on a yen account, you must convert dollars to yen. In this account, the tick value did not go through that yen conversion and appeared as a small number (0.1) in dollars. Why this happens is due to the broker’s internal settings, which are not externally understandable.

What I could verify was only this one account and one symbol. Whether the same issue occurs with other brokers or other symbols can only be checked on my own account.