smtsjhr

var r=4; var t=405; var d=10; [ ...Array(2*d).keys() ].map( i => i-d).map(i=>[(x=(i-0)*.1+r),t/x])

smtsjhr

fetch('https://pcr.tzkt.io/mainnet/chains/main/blocks/head/context/contracts/KT1QxLqukyfohPV5kPkw97Rs6cw1DDDvYgbB/storage')
  .then(response => response.json())
  .then(data => console.log('\n hDAO_pool:: ', h=parseInt(data['args'][1]['args'][0]['args'][1]['args'][2]['int'])*1e-6, '\n XTZ_pool:: ',  x=parseInt(data['args'][1]['args'][0]['args'][3]['int'])*1e-6, '\n HtoX_rate:: ', h/x, '\n XtoH_rate:: ', x/h));