Oscillator · asi
What it computes
A running sum of Wilder’s swing index: 50 times the close’s change plus half the bar’s body plus a quarter of the previous bar’s body, divided by Wilder’s range term, times the larger gap from the previous close over Limit move.
It describes bars that have already printed. QuantZ does not claim this indicator has predictive value, and it is not a recommendation to do anything.
Inputs and lookback
- Limit move · default 30000
Reads open, high, low and close from the loaded bars. It produces nothing until at least 2 bars are loaded, a settling period no parameter shows.
What it assumes about the series
- Bars arrive oldest to newest at one interval, each with a finite open, high, low and close. The input is the chart’s loaded series, whatever its length.
- The function is given bars, not sessions: it does not know the timeframe, where a session opens, or that a gap in the tape is a gap.
- Warm-up bars are omitted rather than padded. The first value appears once the arithmetic has enough history, and nothing is drawn before it.
- The newest bar is the forming bar. Its value uses the live close and settles when the bar closes.
- Cumulative from the first loaded bar: the level is relative to where the loaded history starts, so only its changes carry meaning, and loading more history moves the whole line.
- Limit move is Wilder’s T, the largest move an exchange allows in one session. An instrument with no limit move has no true value for it; the default 30,000 follows the guidance to use an extremely high value there, and any value rescales the line without changing its shape.
Whether a drawn value can change
forming-bar · Moves only on the forming bar. The newest bar’s value moves with its live close until that bar closes. A closed bar’s value is final and is not redrawn when later bars arrive.
This class is read from the registry entry and checked by a test against the function itself: for a class that says closed bars are final, appending a bar must leave every earlier point unchanged, and for a class that says they are not, it must not.
Outside its inputs
- Nothing outside the loaded bars: no longer history than the chart has loaded, and no other interval.
- Nothing inside a bar: no individual trades, no order book, no bid or ask.
- No other symbol, no benchmark, no news, no fundamentals, no earnings dates.
- Volume is not read at all.