Most momentum oscillators have the same weakness: they react to every wiggle in price, so they whipsaw you in choppy markets. The TRIX takes the opposite approach. By smoothing price three times before measuring momentum, it deliberately throws away the small, insignificant moves and keeps only the cycles that matter. Introduced by Jack Hutson in Technical Analysis of Stocks & Commodities magazine in the early 1980s, it remains one of the cleanest trend-momentum tools available on virtually every platform.
How TRIX is calculated
The construction is simple to describe, even if the arithmetic runs deep:
The output oscillates around a zero line. Positive TRIX means the triple-smoothed average is rising (bullish momentum); negative TRIX means it is falling. Most platforms also plot a signal line — usually a 9-period EMA of the TRIX itself — exactly like the MACD's signal line.
The three classic signals
TRIX vs MACD — what's actually different?
Both are EMA-based momentum oscillators with a signal line, so they often look similar. The practical difference is the triple smoothing: TRIX filters out more noise than the MACD's single-smoothed EMAs, so it whipsaws less in ranges — at the cost of turning later at genuine reversals. A useful way to think about it: MACD is faster and dirtier, TRIX is slower and cleaner. Some traders run both and only act when they agree.
Settings and practical use
The default 15-period TRIX with a 9-period signal suits swing trading on H4/daily charts. Shorter settings (e.g. 9/4) make it usable intraday but give back some of the noise filtering that is the whole point of the indicator. Whatever the setting, the golden rules are the same:
Common mistakes
The most frequent error is treating every zero-line touch as a reversal trade in a ranging market — a heavily smoothed indicator hugging zero means no trend, not "imminent breakout". The second is over-shortening the periods until TRIX behaves like the noisy oscillators it was designed to replace. If you find yourself doing that, you probably wanted a different tool.
TRIX will not fire often. That is not a bug — it is the entire design. For traders whose main leak is overtrading choppy markets, a slow, triple-smoothed voice saying "not yet" can be worth more than any fast signal.
How TRIX is calculated
The construction is simple to describe, even if the arithmetic runs deep:
- 1. Take an exponential moving average (EMA) of the closing price — typically 15 periods.
- 2. Take an EMA of that EMA (same length).
- 3. Take an EMA of the result again — a triple-smoothed EMA.
- 4. TRIX is the 1-period percentage rate of change of that triple-smoothed EMA.
The output oscillates around a zero line. Positive TRIX means the triple-smoothed average is rising (bullish momentum); negative TRIX means it is falling. Most platforms also plot a signal line — usually a 9-period EMA of the TRIX itself — exactly like the MACD's signal line.
The three classic signals
- Zero-line crossovers. TRIX crossing above zero says the smoothed trend has turned up; crossing below zero says it has turned down. These are slow but reliable trend-direction signals — think of them as a filter more than a trigger.
- Signal-line crossovers. TRIX crossing its signal line fires earlier than the zero line and is the most common entry trigger. In a confirmed uptrend, buying the TRIX/signal bullish cross after a pullback is the textbook play.
- Divergences. Price making a new high while TRIX makes a lower high (bearish divergence), or price making a new low while TRIX makes a higher low (bullish divergence), warns that the move is running on fumes. Because TRIX is so heavily smoothed, its divergences tend to be more meaningful than RSI divergences — there are fewer of them, and they lean on the dominant cycle rather than noise.
TRIX vs MACD — what's actually different?
Both are EMA-based momentum oscillators with a signal line, so they often look similar. The practical difference is the triple smoothing: TRIX filters out more noise than the MACD's single-smoothed EMAs, so it whipsaws less in ranges — at the cost of turning later at genuine reversals. A useful way to think about it: MACD is faster and dirtier, TRIX is slower and cleaner. Some traders run both and only act when they agree.
Settings and practical use
The default 15-period TRIX with a 9-period signal suits swing trading on H4/daily charts. Shorter settings (e.g. 9/4) make it usable intraday but give back some of the noise filtering that is the whole point of the indicator. Whatever the setting, the golden rules are the same:
- Use TRIX with the trend, not against it. The zero line tells you which side to trade; the signal-line crosses time the entry.
- Never take a TRIX signal in isolation — confirm with structure (support/resistance, higher highs/lows) or a volume read.
- Accept the lag. TRIX will never get you in at the exact bottom; its job is to keep you out of the fakeouts that catch faster oscillators.
- Risk management still does the heavy lifting: define the invalidation level first and size the position accordingly.
Common mistakes
The most frequent error is treating every zero-line touch as a reversal trade in a ranging market — a heavily smoothed indicator hugging zero means no trend, not "imminent breakout". The second is over-shortening the periods until TRIX behaves like the noisy oscillators it was designed to replace. If you find yourself doing that, you probably wanted a different tool.
TRIX will not fire often. That is not a bug — it is the entire design. For traders whose main leak is overtrading choppy markets, a slow, triple-smoothed voice saying "not yet" can be worth more than any fast signal.