pricehistory/dist/esm/candle.setTrend.js

Transforms raw OHLCV series data into enriched candles with technical indicators, pattern recognition, and trend analysis.

import * as utilN from "@nameer/utils";
import { trendKeys } from "./keys.js";
function setCandleTrend(opt, candle, ctx) {
    if (opt.trend !== true)
        return;
    for (const key in candle) {
        const value = candle[key];
        if (value === undefined || typeof value !== "number")
            continue;
        for (const trendKey of trendKeys) {
            if (!key.startsWith(trendKey))
                continue;
            const prev = ctx.trend[key];
            const symbol = utilN.math.change.symbol(prev?.[0], value);
            const direction = symbol?.[0] ?? 0;
            const startAt = direction !== prev?.[1] ? candle.index : prev[2];
            const length = direction !== prev?.[1] ? 1 : prev[3] + 1;
            candle[`${key}Trend`] = symbol;
            candle[`${key}TrendStartAt`] = startAt;
            candle[`${key}TrendLength`] = length;
            ctx.trend[key] = [value, direction, startAt, length];
            break;
        }
    }
}
export default setCandleTrend;
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