Transpiled version (19023L) is out of date.
persistable sclass MAIndicator extends CandleBasedIndicator<Double> is IntegrityCheckable { // The MA calculator settable SimpleMovingAverage ma; // MA values collected as ticker settableWithVar TickerSequence history = new TickerSequence("MA"); // MA value double value = Double.NaN; // How many historic items to keep settable int maxHistoryLength = 1000; Double value() { ret value; } *(int *length) {} { length = 7; onCandleAdded((IVF1<TradingCandle>) candle -> { if (ma == null) makeMA(); ma.add(candle.close()); value = ma.complete() ? ma! : Double.NaN; if (!isNaN(value)) { long time = candle.endTime().toLong(); history?.addIfPriceChanged(value, time); shortenHistory(); } }); } TickerSequence asTicker(L<TradingCandle> candles) { feed(candles); ret history; } void makeMA { ma = new SimpleMovingAverage(length); } void reset :: after { resetFields(this, "value history"); makeMA(); } public void integrityCheck { history?.integrityCheck(); } void shortenHistory { int increment = 10; if (history != null && history.size() > maxHistoryLength+increment) history(history.subSequence(history.size()-maxHistoryLength)); } }
Began life as a copy of #1036532
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Snippet ID: | #1036559 |
Snippet name: | MAIndicator [simple moving average, trading indicator] |
Eternal ID of this version: | #1036559/7 |
Text MD5: | 3e11eeec306052ffb833566511b4d7e8 |
Author: | stefan |
Category: | javax / trading |
Type: | JavaX fragment (include) |
Public (visible to everyone): | Yes |
Archived (hidden from active list): | No |
Created/modified: | 2023-03-28 19:37:56 |
Source code size: | 1372 bytes / 57 lines |
Pitched / IR pitched: | No / No |
Views / Downloads: | 167 / 250 |
Version history: | 6 change(s) |
Referenced in: | #1003674 - Standard Classes + Interfaces (LIVE continued in #1034167) |