@showr/indicators/dist/sma/sma.js

Technical indicators for Trading made with Showr

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.SMA = void 0;
const core_1 = require("@showr/core");
class SMA extends core_1.Indicator {
    constructor(name = 'SMA', params) {
        super(name, function (dataset) {
            const { attribute, period = 5 } = params;
            const datasetLength = dataset.value.length;
            const lastSMA = dataset.at(-2)?.getIndicator(this.name);
            if (lastSMA !== undefined && datasetLength > period) {
                const firstAttributeValue = dataset.valueAt(-1 - period, attribute);
                const lastAttributeValue = dataset.valueAt(-1, attribute);
                const change = lastAttributeValue - firstAttributeValue;
                return (lastSMA * period + change) / period;
            }
            else {
                if (datasetLength < period) {
                    return dataset.valueAt(-1, attribute);
                }
                else {
                    let total = 0;
                    for (let i = datasetLength - period; i < datasetLength; i++) {
                        total += dataset.valueAt(i, attribute);
                    }
                    return total / period;
                }
            }
        }, {
            params,
        });
    }
}
exports.SMA = SMA;