@cmike444/supply-and-demand-zones
Version:
A library for identifying supply and demand zones in candlestick data.
44 lines (43 loc) • 2.04 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.dropBaseDrop = dropBaseDrop;
const enums_1 = require("../enums");
const constants_1 = require("../constants");
const isBearishDecisiveCandle_1 = require("./isBearishDecisiveCandle");
const isIndecisiveCandle_1 = require("./isIndecisiveCandle");
const findPatternEnd_1 = require("./findPatternEnd");
const isBearishExplosiveCandle_1 = require("./isBearishExplosiveCandle");
/**
* Identifies a drop-base-drop pattern in a series of candlestick data.
*
* @param candles - Array of Candle objects to evaluate.
* @returns A SupplyZone object if the pattern is identified, otherwise `null`.
*/
function dropBaseDrop(candles) {
if (candles.length < constants_1.MIN_ZONE_CANDLES)
return null;
// Identify the first drop
const dropEndIndex = (0, findPatternEnd_1.findPatternEnd)(candles, 0, isBearishDecisiveCandle_1.isBearishDecisiveCandle);
if (dropEndIndex === 0)
return null;
// Identify the base
const baseEndIndex = (0, findPatternEnd_1.findPatternEnd)(candles, dropEndIndex, isIndecisiveCandle_1.isIndecisiveCandle, constants_1.MAX_BASE_CANDLES);
const baseCandleCount = baseEndIndex - dropEndIndex;
if (baseCandleCount < constants_1.MIN_BASE_CANDLES)
return null;
// Identify the second drop
const dropStartIndex = (0, findPatternEnd_1.findPatternEnd)(candles, baseEndIndex, isBearishExplosiveCandle_1.isBearishExplosiveCandle);
if (dropStartIndex === baseEndIndex)
return null;
// Return the identified drop-base-drop pattern as a SupplyZone
const baseCandles = candles.slice(dropEndIndex, baseEndIndex);
return {
direction: enums_1.ZONE_DIRECTION.SUPPLY,
type: enums_1.ZONE_TYPE.DROP_BASE_DROP,
proximalLine: Math.min(...baseCandles.map(c => c.low)),
distalLine: Math.max(...baseCandles.map(c => c.high)),
startTimestamp: candles[0].timestamp,
endTimestamp: candles[dropStartIndex - 1].timestamp,
};
}
;