🦕deno-talib

Technical Analysis written in Typescript for Deno

Installation

deno install https://deno.land/x/talib/index.ts

# or force to upgrade
deno install -f https://deno.land/x/talib/index.ts

# or specific version
deno install -f https://deno.land/x/talib@0.0.9/index.ts

Basic Usage

import { RSI } from 'https://deno.land/x/talib/index.ts';
# or specific version 
# import { RSI } from 'https://deno.land/x/talib@0.0.5/index.ts';

const inputRSI = {
  values : [127.75,129.02,132.75,145.40,148.98,137.52,147.38,139.05,137.23,149.30,162.45,178.95,200.35,221.90,243.23,243.52,286.42,280.27,277.35,269.02,263.23,214.90],
  period : 14
};
const expectedResult = [
    86.41,86.43,89.65,86.50,84.96,80.54,77.56,58.06
];

RSI.calculate(inputRSI)

There are three ways you can use to get the indicator results.

1. calculate

Every indicator has a static method calculate which can be used to calculate the indicator without creating an object.

import { SMA } from 'https://deno.land/x/talib/index.ts';

let prices = [1,2,3,4,5,6,7,8,9,10,12,13,15];
let period = 10;

sma({period : period, values : prices})
import { SMA } from 'https://deno.land/x/talib/index.ts';

let prices = [1,2,3,4,5,6,7,8,9,10,12,13,15];
let period = 10;

SMA.calculate({period : period, values : prices})

2. nextValue

nextValue method is used to get the next indicator value.

let sma = new SMA({period : period, values : []});
let results = [];

prices.forEach(price => {
  let result = sma.nextValue(price);
  if(result)
    results.push(result)
});

3. getResult

This a merge of calculate and nextValue. The usual use case would be

  • Initialize indicator with available price value

  • Get results for initialized values

  • Use nextValue to get next indicator values for further tick.

let sma = new SMA({period : period, values : prices});

sma.getResult(); // [5.5, 6.6, 7.7, 8.9]
sma.nextValue(16); // 10.1

Note: Calling nextValue will not update getResult() value.

Precision

This uses regular javascript numbers, so there can be rounding errors which are negligible for a technical indicators, you can set precision by using the below config. By default there is no precision set.

import talib from 'https://deno.land/x/talib/index.ts';

talib.setConfig('precision', 10);

Bullish or Bearish Indicator

Search for all bullish or bearish using

import { bullish } from 'https://deno.land/x/talib/index.ts';

const twoDayBullishInput = {
  open: [23.25,15.36],
  high: [25.10,30.87],
  close: [21.44,27.89],
  low: [20.82,14.93],
}

bullish(twoDayBullishInput) // true

Available Indicators

Other Utils

Chart Types

CandleStick Pattern

Reference

Deno Url

Documentation

Contribute

Create issues about anything you want to report, change of API's, or request for adding new indicators. You can also create pull request with new indicators.

Thanks

Original node package is from anandanand84. Thanks to https://github.com/anandanand84/technicalindicators

NextTechnical Indicators

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