@dickyindra/klinecharts
Version:
Lightweight k-line chart built with html5 canvas
79 lines (73 loc) • 1.98 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
/**
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
* http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* EMA 指数移动平均
*/
var _default = {
name: 'EMA',
shortName: 'EMA',
series: 'price',
calcParams: [6, 12, 20],
precision: 2,
shouldCheckParamCount: false,
shouldOhlc: true,
plots: [{
key: 'ema6',
title: 'EMA6: ',
type: 'line'
}, {
key: 'ema12',
title: 'EMA12: ',
type: 'line'
}, {
key: 'ema20',
title: 'EMA20: ',
type: 'line'
}],
regeneratePlots: function regeneratePlots(params) {
return params.map(function (p) {
return {
key: "ema".concat(p),
title: "EMA".concat(p, ": "),
type: 'line'
};
});
},
calcTechnicalIndicator: function calcTechnicalIndicator(dataList, _ref) {
var params = _ref.params,
plots = _ref.plots;
var closeSum = 0;
var emaValues = [];
return dataList.map(function (kLineData, i) {
var ema = {};
var close = kLineData.close;
closeSum += close;
params.forEach(function (p, index) {
if (i >= p - 1) {
if (i > p - 1) {
emaValues[index] = (2 * close + (p - 1) * emaValues[index]) / (p + 1);
} else {
emaValues[index] = closeSum / p;
}
ema[plots[index].key] = emaValues[index];
}
});
return ema;
});
}
};
exports.default = _default;