Learn · The Twelve Measurements — Lesson 1 of 12
Price trend and moving averages, explained
Almost every measurement in the composite reacts to what happened this week. Trend is the one that answers a longer question: which direction has this market actually been travelling, once you stop staring at today's candle?
What it measures
Compares the 50-day moving average to the 200-day, and price to both. It is the slowest measurement in the composite and carries the largest share, because a durable direction is harder to fake than a single day's move.
A moving average is nothing more than the average closing price over a window, recalculated each day. The 50-day average summarises the last ten trading weeks; the 200-day summarises roughly a year. Neither predicts anything — they compress history into two slow-moving lines so that the direction of travel becomes visible through the daily noise.
The classic configurations have names. When the 50-day rises through the 200-day, chartists call it a golden cross; when it falls through, a death cross. Farlens reads the same geometry without the drama: where price sits relative to both averages, and how the averages sit relative to each other, graded continuously rather than as an event.
Why it moves prices
Trend matters for a mechanical reason: a large amount of money is managed by rules that reference it. Systematic funds scale exposure up and down with trend measures, index-following products rebalance along it, and discretionary traders watch the same two averages everyone else watches. When price crosses a widely-observed average, behaviour actually changes — orders fire that were conditional on exactly that line. The measurement is partly self-fulfilling, which is precisely why it has kept working for decades after being published.
It is also the hardest measurement to fake. A single strong session can bend momentum or spike volume; it barely moves a 200-day average. Durable direction requires months of consistent closes, which is why trend earns the largest share of the composite.
How to read it
Positive: the shorter average is above the longer one and price is above both — the recent past has been an uptrend. Negative: the reverse.
The useful subtlety is disagreement between the timeframes. Price above a rising 200-day but below a falling 50-day describes a long uptrend digesting a rough patch — a different situation from price below both, even though both print as “weakening”. That texture is why the app shows the measurement's own sentence for the day rather than a bare number.
How Farlens uses it
Trend carries 12.9% of the Farlens composite (weight 1.5 of 11.6 across all twelve measurements). Coverage: Available for anything with enough price history.
Two conventions matter here. First, a measurement that cannot be observed for an instrument is skipped, never counted as zero — a zero would read as “neutral” and quietly dilute the composite. Second, on any given day a contribution is the measurement's score times its weight, divided by the total weight of the measurements present that day — so the published breakdown always sums to the score beside it. The full stack, with every weight published, is on the signals page.
A worked example
Farlens publishes one frozen example reading — AAPL on 22 July 2026, deliberately weeks old — so the shape of a reading can be studied without opening the live layer. That day the composite printed +14.7, “Mixed”, and this measurement read +100.0.
| Measurement present that day | Reading |
|---|---|
| Trend | +100.0 |
| Advance/decline pressure | +100.0 |
| On-Balance Volume | +97.4 |
| Momentum (RSI) | −75.7 |
| Money Flow Index | −63.3 |
| Sector rotation | −45.3 |
| Volume surge | −29.7 |
| Short volume share | −23.9 |
Trend read +100.0 that day — the strongest possible reading — while momentum read −75.7. That combination is the classic texture of a long uptrend after a sharp short-term pullback: the year-scale direction intact, the recent fortnight bruised. The composite's job is exactly to hold both of those truths at once.
A real reading, kept deliberately stale. Descriptive of one historical day — not a prediction, and not representative of current conditions.
What it cannot tell you
Trend is slow by construction, which means it is late by construction. It cannot see a reversal until months of closes have accumulated; at genuine turning points it is reliably the last measurement to change its mind. It also says nothing about why a market has been rising — a trend built on broad participation and one built on three mega-cap names look identical to a moving average. Other measurements in the stack (breadth, money flow, volume) exist to catch that difference.
Frequently asked
Is a golden cross bullish?
It describes the recent past — the 50-day average has risen through the 200-day, which only happens after months of net gains. Studies of what follows show mixed results depending on period and market. Farlens treats it as one continuous input among twelve, not an event to act on.
Why 50 and 200 days rather than other windows?
Partly convention, and the convention is the point: because these are the most-watched windows in markets, behaviour clusters around them. A privately optimal window would describe the same history without the self-fulfilling audience.
Does trend work on crypto?
The arithmetic applies to anything with price history, and Farlens computes it for crypto as well. Crypto additionally gets a cycle-scale cousin — the 200-week average — covered in lesson 7.