The stochastic, under the same rule as RSI

What it means

%K is the last close expressed as a position inside the highest high and lowest low of the previous fourteen bars: 100 means it closed at the very top of that range, 0 at the very bottom. %D is %K smoothed over three bars, and %D is the line a reading is taken from here.

The smoothing is not decoration. Raw %K flips between extremes on a single bar, so a page built on it would report a different state on every refresh while the market did nothing unusual.

It is a different measurement from RSI, and the difference is worth knowing. RSI compares the SIZE of recent gains with recent losses; the stochastic ignores size entirely and asks only where in the range the close landed. A quiet drift to the top of a narrow range pins the stochastic and leaves RSI unremarkable.

How we detect it

The engine computes %K over fourteen bars and %D over three, then applies the same gate RSI is under: the reading is surfaced only when %D is at or below 20 while price is near an important support zone, or at or above 80 while price is near an important resistance zone.

The thresholds are the conventional 20 and 80 rather than RSI's 24 and 80. The two are different scales — %D is a position inside a range and spends far more of its life pinned at the ends — so borrowing RSI's number would make them read differently strict while looking identically calibrated.

When every high equals every low across the window the range has no width, the position has no answer, and the engine reports that it has no reading rather than returning the midpoint. A pegged or halted stretch is the case this protects.

When the read carries information

• Price is genuinely at a zone, so a position inside a range becomes a statement about something.
• The range the fourteen bars cover is a real range rather than one enormous bar and thirteen small ones.
• The timeframe is slow enough that fourteen bars is a meaningful stretch of market.

When it misleads

• In a trend the stochastic pins at an extreme and stays there for many bars. This is more pronounced than with RSI, because reaching the top of the range is easier than sustaining an advantage in average gains.
• In a very narrow range, tiny moves swing %K across the whole scale, so an extreme reading describes a market that has barely moved.
• The gate can be right and still frustrating: a reader watching an obviously pinned stochastic will be told it was not surfaced, because price was nowhere near a zone.

How it reaches you

It sits exactly where RSI sits in the analysis order — after zones, proximity and structure. Adding a second oscillator does not add a second opinion; both are secondary by design.

An extreme stochastic is never presented on our surfaces as a reason to do anything, and a pinned reading is a description of the last fourteen bars rather than a claim about the next one.