Is a fractal a buy or sell signal?

Neither on its own. A fractal is a definition — the middle bar of five held the extreme — so it marks a level, not a direction. What you do with the level is the strategy: break through it, fade it, or put a stop behind it. Treating the arrow itself as an entry is the most common misreading.

Why is the fractal always two bars behind?

Because the pattern needs two bars on each side of the middle one, so it cannot be confirmed until the right-hand side has closed. That lag is structural and cannot be removed. It also makes fractals a common source of accidental look-ahead in backtests — a test that reads the value at the extreme's own bar is using information that did not exist yet.

Can I change the number of bars in a fractal?

Not through iFractals, which takes no arguments at all. Variants that use seven or nine bars exist as custom indicators. The upside of the fixed definition is that there is nothing here to overfit, and a fractal on your chart is the same object as a fractal on everyone else's.

Why does my fractal rule read an empty value?

Because most bars have no fractal, and both buffers are empty on those bars. Unlike every other indicator here, reading index 0 usually returns the empty value rather than a number. A rule has to scan backwards to the most recent printed value — the Builder's Fractals node does this with its search-bars window.

Can I build a Fractals EA without coding?

Yes for breakouts and structure-anchored stops. The Fractal Breakout template scans back for the most recent upper and lower fractal and compares price against them, gated on expanding volatility. Reading a sequence of fractals as market structure — higher highs, lower lows — needs to hold several past levels and requires custom MQL5.

How should I validate settings before going live?

Backtest on quality tick data first, then run the EA on a demo account before risking money. With fractals specifically, check that the test respects the two-bar confirmation lag — results that look unusually clean are often reading a level before it existed. When optimising anything around the signal, hold back data the search never saw.

Fractals for MT5 traders

What Fractals tell you

A fractal is a definition, not a forecast: the middle bar of five had the highest high, or the lowest low. Once two bars have closed on the right-hand side the pattern is fixed and cannot change. That is what makes fractals useful as structure — and what makes them permanently late by exactly two bars.

An upper fractal is a confirmed swing high, not a sell signal
The level is fixed forever once printed
The confirmation always arrives two bars after the extreme itself

1 Take five consecutive bars
2 Check whether the middle one holds the extreme
3 Mark the level once the right side closes

Hiển thị công thức & chi tiết tính toán

A fractal is a five-bar pattern with a strict definition and no parameters:

Take five consecutive bars.
An upper fractal exists when the middle bar’s high is higher than the highs of the two bars before it and the two bars after it. The value published on UPPER_LINE (buffer 0) is that high.
A lower fractal exists when the middle bar’s low is lower than the lows of the two bars on each side. The value goes on LOWER_LINE (buffer 1).
On every other bar both buffers hold the indicator’s empty value, and MT5 draws nothing.

The two-bar right side is what makes a fractal confirmed rather than provisional: once those bars have closed, the pattern is settled permanently and the level never moves. It is also why the information always arrives two bars after the extreme it describes — the price at the fractal is history by the time the fractal exists.

That emptiness is the practical difference from every other indicator in this catalogue. RSI has a value on every bar; a fractal does not. Any rule that reads the buffer has to search backwards for the most recent real value, and a rule written as though index 0 always holds a number will compare against nothing at all without raising an error.

In MQL5 the call is iFractals(symbol, period) — no periods, no applied price, no options — and it returns a handle to two buffers. Bill Williams introduced fractals alongside the Alligator and the Awesome Oscillator as the structural element of his system.

Tín hiệu

Các tín hiệu có thể backtest của Fractals — và điều kiện thị trường phù hợp với từng tín hiệu.

Fractal Breakout

Sẵn sàng trong Builder

Điều kiện: Price trades through the most recent fractal high or low
Điều kiện tốt nhất: Breakouts
Sử dụng thông thường: Enter at a level the market itself defined

Swing Level Hold

Sẵn sàng trong Builder

Điều kiện: Price returns to a fractal and turns away
Điều kiện tốt nhất: Trending markets
Sử dụng thông thường: Join a trend at structure rather than at a fixed distance

Stop Placement

Sẵn sàng trong Builder

Điều kiện: Stop set just beyond the last opposite fractal
Điều kiện tốt nhất: Any
Sử dụng thông thường: Anchor risk to structure instead of an arbitrary pip count

Higher Highs / Lower Lows

Logic nâng cao

Điều kiện: A sequence of fractals ordered in one direction
Điều kiện tốt nhất: Trend confirmation
Sử dụng thông thường: Read market structure across several swings

Triển khai trong MT5

Những gì MetaTrader 5 thực sự tính và vẽ — cơ sở tham chiếu cho mọi quy tắc trên trang này.

Bộ đệm

Chỉ số	Bộ đệm	MT5 vẽ dưới dạng	Chứa gì
0	UPPER_LINE	Arrow above the bar	The high of a confirmed swing high. Empty on every bar that is not one — which is the large majority.
1	LOWER_LINE	Arrow below the bar	The low of a confirmed swing low. Also empty on most bars.

Ghi chú nền tảng

Hàm MQL5

iFractals

Giá áp dụng

Chỉ báo này không nhận tham số giá áp dụng.

Trong Builder

iFractals takes only a symbol and timeframe. The pattern is defined on highs and lows directly, so there is nothing to configure — the Builder's Fractals node exposes a line selector, a search-bars window and timeframe, where the search window is the node's own way of finding the most recent non-empty value.

Ghi chú triển khai

iFractals publishes empty values on most bars, so reading buffer index 0 usually returns nothing. Any rule has to scan backwards for the most recent printed value — that is what the Builder node's search-bars window does.
This is the practical difference between Fractals and every other indicator on this site: the others always have a value, and a rule that assumes one here will silently compare against an empty buffer.
Reading a sequence of fractals as higher highs or lower lows means holding several past levels at once, which the node palette does not express; that requires custom MQL5.

Hoạt động tốt nhất / sử dụng cẩn thận

Không có chỉ báo nào có lợi thế toàn diện. Đây là nơi Fractals hỗ trợ — và nơi nó gây hiểu lầm.

Hoạt động tốt nhất

Defining breakout levels
Anchoring stops to structure
Higher timeframes
With a volatility or trend filter

Sử dụng cẩn thận

Treating a fractal as a reversal signal
Low timeframes where every wiggle prints one
Ignoring the two-bar confirmation lag
Reading structure without a rule for which fractal counts

Xây dựng chiến lược Fractals

Kết nối tín hiệu vào quy tắc vào lệnh và thoát lệnh, sau đó xuất EA MT5 có thể biên dịch — không cần code.

Upper fractal (last 50 bars)
Lower fractal (last 50 bars)
Fast ATR above slow ATR
Price breaks the upper fractal → Open Buy · SL 50 / TP 100
Price breaks the lower fractal → Open Sell

Kết hợp Fractals với các chỉ báo khác

Một chỉ báo hiếm khi đứng một mình. Các cặp kết hợp này bù đắp điểm mù của Fractals.

Fractals + ATR

Price breaks the last fractal
Fast ATR above slow ATR
Buy

Lý do: Only take a structural breakout while volatility is genuinely expanding, so a break on a dead bar never triggers the trade
Điều kiện tốt nhất: Breakout

Xây dựng chiến lược này →

Fractals + Alligator

Lines fanned up
Price breaks the last fractal high
Buy

Lý do: Use Bill Williams' own regime tool to decide whether a break is worth taking, which is how the two were designed to be read
Điều kiện tốt nhất: Trend start

No single-flow template pairs Fractals with the Alligator. Start from Fractal Breakout and add Alligator nodes with a Cross.

Mở Builder →

Fractals + ADX

ADX > 25
Price breaks the last fractal high
Buy

Lý do: Require measurable trend strength before trading a break, since fractals print constantly inside a range and every one of them looks like a level
Điều kiện tốt nhất: Trending

No single-flow template pairs Fractals with ADX. Start from Fractal Breakout and add an ADX node with a Compare at 25.

Mở Builder →

Tham số

Giá trị ban đầu để xác nhận trên cặp tiền và khung thời gian của bạn — không phải cài đặt được đảm bảo.

Tham số	Mặc định	Khoảng thử nghiệm đề xuất	Chức năng
Pattern length	5 bars	—	Fixed in the indicator. iFractals takes no arguments at all — the five-bar definition cannot be changed without writing a custom indicator.
Line	Upper / Lower	—	Which buffer a rule reads. A buffer selector, not a numeric setting.
Search bars	50	20–200	Not an indicator input — the Builder node's own window for scanning back to the most recent non-empty fractal. Too short and the node finds nothing on quiet stretches.

Cài đặt sẵn ban đầu

Standard 5 bars The only configuration — iFractals has no inputs

Ví dụ thị trường

Nơi Fractals hoạt động, nơi nó thất bại, và bộ lọc thay đổi kết quả như thế nào.

Thành công

Break of a real level

Price consolidates, prints a clear fractal high, and then trades decisively through it with volatility expanding — the case the template trades.

Thất bại

Fractals inside the chop

In a tight range a fractal prints every few bars and price crosses each one immediately. Every level looks structural and none of them is.

Đã lọc

Volatility filter suppresses the break

The same fractal is crossed while ATR sits at a local low, the trade is skipped, and price drifts back inside the range.

Các chỉ báo liên quan

ATR Xem hướng dẫn →

Alligator Xem hướng dẫn →

ADX Xem hướng dẫn →

FAQ

Is a fractal a buy or sell signal?: Neither on its own. A fractal is a definition — the middle bar of five held the extreme — so it marks a level, not a direction. What you do with the level is the strategy: break through it, fade it, or put a stop behind it. Treating the arrow itself as an entry is the most common misreading.
Why is the fractal always two bars behind?: Because the pattern needs two bars on each side of the middle one, so it cannot be confirmed until the right-hand side has closed. That lag is structural and cannot be removed. It also makes fractals a common source of accidental look-ahead in backtests — a test that reads the value at the extreme's own bar is using information that did not exist yet.
Can I change the number of bars in a fractal?: Not through iFractals, which takes no arguments at all. Variants that use seven or nine bars exist as custom indicators. The upside of the fixed definition is that there is nothing here to overfit, and a fractal on your chart is the same object as a fractal on everyone else's.
Why does my fractal rule read an empty value?: Because most bars have no fractal, and both buffers are empty on those bars. Unlike every other indicator here, reading index 0 usually returns the empty value rather than a number. A rule has to scan backwards to the most recent printed value — the Builder's Fractals node does this with its search-bars window.
Can I build a Fractals EA without coding?: Yes for breakouts and structure-anchored stops. The Fractal Breakout template scans back for the most recent upper and lower fractal and compares price against them, gated on expanding volatility. Reading a sequence of fractals as market structure — higher highs, lower lows — needs to hold several past levels and requires custom MQL5.
How should I validate settings before going live?: Backtest on quality tick data first, then run the EA on a demo account before risking money. With fractals specifically, check that the test respects the two-bar confirmation lag — results that look unusually clean are often reading a level before it existed. When optimising anything around the signal, hold back data the search never saw.

Glossary

Thuật ngữ chính

Backtest Tối ưu hóa quá mức Cắt lỗ (stop loss)