Basic Chart

import ccxt from '../../js/ccxt.js';
import asciichart from 'asciichart';
import asTable from 'as-table';
import ololog from 'ololog'
import ansicolor from 'ansicolor';

const log = ololog.configure ({ locate: false })

ansicolor.nice

//-----------------------------------------------------------------------------

;(async function main () {

   // experimental, not yet implemented for all exchanges
   // your contributions are welcome ;)

   const index = 4 // [ timestamp, open, high, low, close, volume ]
   const ohlcv = await new ccxt.okcoin ().fetchOHLCV ('BTC/USD', '15m')
   const lastPrice = ohlcv[ohlcv.length - 1][index] // closing price
   const series = ohlcv.map (x => x[index])         // closing price
   const bitcoinRate = ('₿ = $' + lastPrice).green
   const chart = asciichart.plot (series, { height: 15, padding: '            ' })
   log.yellow ("\n" + chart, bitcoinRate, "\n")
   process.exit ()

}) ()