Meridian（メリディアン）USDJPY M5

When choosing EA, do you have such concerns?

• One day you may suddenly stop winning
• A single sharp fluctuation may greatly deplete your account funds
• You may end up just watching growing unrealized losses

Several months of beautiful upward trends, but then one day, the accumulated profits disappear——
With a grid averaging (averaging down) or martingale type EA, many people have this experience.

The EA I developed is designed first and foremost to minimize this anxiety as much as possible.
Do not use averaging down, martingale, or hedging. Do not increase positions without limit.
Prioritize “not exiting the market” over “greatly increasing positions”—
I develop all EAs with this policy.

Meridian is the single best expression of this policy.

• Positions always one, trades limited to once a day, settlement time fixed every time
• AndFrom 2010 to 2025, positive annual result in all 16 years

A single trade is not flashy. But it is designed first and foremost to “not exit the market.”
The result is these 16 years.

Performance Summary (FXTF, backtest of ~16.5 years)

• Annual profit16 years of positive results(2010–2025)
• Profit Factor2.48
• Win rate63.2%
• Maximum drawdown39,675 yen(19.8% of initial capital of 200,000 yen)
• Average per year during the verification periodApproximately 44,000 yen(Initial capital 200,000 yen, suggested lot, simple interest basis, about 22% per year)

Three grounds to trust these figures

① Real trading costs are incorporated into the verification
Using Dukascopy tick data (Tick Data Manager, all ticks, modeling quality 99.90%),
with an added variable spread + 0.8–1.0 pips for verification.
We did not conduct a “pretty” verification with zero spread or fixed values.

② Results are consistent across two different verification environments
We verified the same period under several environments with different spreads, and the results were almost identical.
They are not “phantom gains” that only exist in a specific environment.

③ Unfavorable numbers are also published on this page
The mid-2026 progress (currently negative) is also published in the yearly table below.
We believe it is the most honest to not hide any numbers needed for judgment.

Suitable for people like this

• People who want to choose an EA by its resilience after a single loss
• People seeking a low-frequency trading EA that can be run passively
• People looking for an EA that does not use averaging down or martingale
• People looking for an EA that can be run in a domestic account as is

Not suitable for

• People who want to see many trades every day (we trade 2–3 times per month)
• People aiming to dramatically grow funds in a short period
• People who want to avoid holding positions overnight (this EA holds them overnight)

“Moves only 2–3 times a month” can be reframed as
no need to worry about positions increasing every time you open your smartphone—
During work or sleep, the EA waits quietly only on days when the conditions align.

Backtest results (FXTF, recommended lot 0.09)

Yearly profit/loss (recommended lot 0.09, FXTF)

※2026 year is a mid-year progress as of July. Not the full-year result.

After the Lehman shock, yen appreciation, Abenomics, COVID-19 shock, and the 2022 historic
yen depreciation—the 16-year consecutive-positive results through various, differing market regimes.

Backtest verification conditions

■ FXTF (domestic broker)
  Data used     : Dukascopy tick data (Tick Data Suite)
  Spread        : Variable spread + add-on of 0.8 pips
  Model         : All ticks / modeling quality 99.90%
  Period        : 2010.01 〜 2026.07
  Initial margin: 200,000 yen

Features

1.Time-based simple settlement— After entry, settlement occurs at a fixed time. No averaging down, martingale, or hedging is used

2.Fixed holding time— Always close positions at the next morning’s settlement time. Do not carry over profits or losses

3.Up to 1 trade per day, maximum 1 position— Does not burden the account (under certain conditions may enter with twice the base lot)

4.Mis-setup guard— If set on an unsupported currency pair or timeframe, it will warn and stop to prevent misoperation

5.GMT auto-correction— Automatically detects broker server time (manual setting also possible)

Starting with 0.01 lot is fine

There is no need to start trading with the recommended lot right away.
We also publish verification results with 0.01 lot (margin around 50,000 yen)
(Net profit 80,747 yen; max DD 4,408 yen).
First test with the minimum lot to verify behavior, and once satisfied, you can raise the lot
— This is the designed sequence. The .set files also come in two versions: “conservative” and “recommended.”

On using with selling-only EA

Meridian is a buy-direction-only EA. A selling-only USDJPY EA
“Halcyon USDJPY M5” (also developed by me and settled the same day) can be used together to diversify trading directions.
They can be used on the same account because the magic numbers are different.

Recommended environment

Please note

• This EA does not set stop-loss orders (no stop orders);it is a time-based design that settles at a fixed time. Unforeseen volatile movements during holding will be reflected in profit/loss (the 16.5-year verification was conducted under this specification)
• Because positions are held overnight,swap points affect profitability. The verification uses your broker’s current swap terms. MT4 verifications apply current swap values across the entire period, so past periods with low interest rates show more favorable swap income (about 10% of total net profit across the verification period)
• If your account’s spread is wider than the verification condition (USDJPY add-on 0.8–1.0 pips), performance will decline
• This EA trades based on a specific time. If your broker’s server time is not GMT+2/+3, you need to set the parameter “GMTOffset” (see manual)

Verification reports (FXTF, 0.01 lot, recommended lot) are all published.
Please verify the numbers with your own eyes and then decide.

・Past performance does not guarantee future profits.
・There may be losses depending on market conditions.
・Please trade at your own risk.
・This EA is not intended to provide investment advice.
・To prevent trouble, domestic accounts are recommended for operation.