Definitions
In plain terms
It places the current close on a zero-to-100 scale when the selected range has positive width.
Technical
The implementation freezes lookback, high/low/close basis, window endpoints, ties, zero-range policy, readiness, and precision.
Scope
It is a position within a range, not a percentage return.
Formula
Fast %K = 100 * (C - LL) / (HH - LL)K^f_t=100\frac{C_t-LL_t}{HH_t-LL_t}| Symbol | Meaning | Unit |
|---|---|---|
C_t | current close | price |
LL_t | rolling lowest low | price |
HH_t | rolling highest high | price |
Output unit: percent
Examples
- A governed lesson calculates or identifies Fast Stochastic Percent K only after its inputs, window, state, scale, and edge cases are declared.
Common misconceptions
- It is a position within a range, not a percentage return.
Concept relationships
Prerequisites
Where this concept is used
Evidence and governance
- Stochastic Oscillator Slow TA-Lib · first party technical publication
Supports: preferred label, short definition, technical definition, formula
Limits: Moving-average types, zero-range policy, and first-ready indexes can differ across implementations.
- Reviewed by
- fintech-builder-batch-008
- Last reviewed
- 2026-07-29
- Next review
- 2027-07-29
- Record status
- published