blockchain.info select value

Challenge: Show data from https://blockchain.info/tobtc?currency=USD&value=500 where USD and value is a parameter
Twig-Code:
{% set js1 = '{"ARS":{"15m":95570003.1599999964237213134765625,"last":95570003.1599999964237213134765625,"buy":95570003.1599999964237213134765625,"sell":95570003.1599999964237213134765625,"symbol":"ARS"},"AUD":{"15m":95205.1900000000023283064365386962890625,"last":95205.1900000000023283064365386962890625,"buy":95205.1900000000023283064365386962890625,"sell":95205.1900000000023283064365386962890625,"symbol":"AUD"},"BRL":{"15m":348747.9299999999930150806903839111328125,"last":348747.9299999999930150806903839111328125,"buy":348747.9299999999930150806903839111328125,"sell":348747.9299999999930150806903839111328125,"symbol":"BRL"},"CAD":{"15m":92731.520000000004074536263942718505859375,"last":92731.520000000004074536263942718505859375,"buy":92731.520000000004074536263942718505859375,"sell":92731.520000000004074536263942718505859375,"symbol":"CAD"},"CHF":{"15m":52451.7600000000020372681319713592529296875,"last":52451.7600000000020372681319713592529296875,"buy":52451.7600000000020372681319713592529296875,"sell":52451.7600000000020372681319713592529296875,"symbol":"CHF"},"CLP":{"15m":58738957.520000003278255462646484375,"last":58738957.520000003278255462646484375,"buy":58738957.520000003278255462646484375,"sell":58738957.520000003278255462646484375,"symbol":"CLP"},"CNY":{"15m":465246.0399999999790452420711517333984375,"last":465246.0399999999790452420711517333984375,"buy":465246.0399999999790452420711517333984375,"sell":465246.0399999999790452420711517333984375,"symbol":"CNY"},"CZK":{"15m":1393017.16999999992549419403076171875,"last":1393017.16999999992549419403076171875,"buy":1393017.16999999992549419403076171875,"sell":1393017.16999999992549419403076171875,"symbol":"CZK"},"DKK":{"15m":429375.8300000000162981450557708740234375,"last":429375.8300000000162981450557708740234375,"buy":429375.8300000000162981450557708740234375,"sell":429375.8300000000162981450557708740234375,"symbol":"DKK"},"EUR":{"15m":57463.580000000001746229827404022216796875,"last":57463.580000000001746229827404022216796875,"buy":57463.580000000001746229827404022216796875,"sell":57463.580000000001746229827404022216796875,"symbol":"EUR"},"GBP":{"15m":50301.27999999999883584678173065185546875,"last":50301.27999999999883584678173065185546875,"buy":50301.27999999999883584678173065185546875,"sell":50301.27999999999883584678173065185546875,"symbol":"GBP"},"GHS":{"15m":712647.6899999999441206455230712890625,"last":712647.6899999999441206455230712890625,"buy":712647.6899999999441206455230712890625,"sell":712647.6899999999441206455230712890625,"symbol":"GHS"},"HKD":{"15m":530819.900000000023283064365386962890625,"last":530819.900000000023283064365386962890625,"buy":530819.900000000023283064365386962890625,"sell":530819.900000000023283064365386962890625,"symbol":"HKD"},"HRK":{"15m":312986.619999999995343387126922607421875,"last":312986.619999999995343387126922607421875,"buy":312986.619999999995343387126922607421875,"sell":312986.619999999995343387126922607421875,"symbol":"HRK"},"HUF":{"15m":21576264.5199999995529651641845703125,"last":21576264.5199999995529651641845703125,"buy":21576264.5199999995529651641845703125,"sell":21576264.5199999995529651641845703125,"symbol":"HUF"},"INR":{"15m":6171468.379999999888241291046142578125,"last":6171468.379999999888241291046142578125,"buy":6171468.379999999888241291046142578125,"sell":6171468.379999999888241291046142578125,"symbol":"INR"},"ISK":{"15m":8234732.90000000037252902984619140625,"last":8234732.90000000037252902984619140625,"buy":8234732.90000000037252902984619140625,"sell":8234732.90000000037252902984619140625,"symbol":"ISK"},"JPY":{"15m":10572162.24000000022351741790771484375,"last":10572162.24000000022351741790771484375,"buy":10572162.24000000022351741790771484375,"sell":10572162.24000000022351741790771484375,"symbol":"JPY"},"KRW":{"15m":97350973.3499999940395355224609375,"last":97350973.3499999940395355224609375,"buy":97350973.3499999940395355224609375,"sell":97350973.3499999940395355224609375,"symbol":"KRW"},"NGN":{"15m":91805461.9000000059604644775390625,"last":91805461.9000000059604644775390625,"buy":91805461.9000000059604644775390625,"sell":91805461.9000000059604644775390625,"symbol":"NGN"},"NZD":{"15m":113262.91000000000349245965480804443359375,"last":113262.91000000000349245965480804443359375,"buy":113262.91000000000349245965480804443359375,"sell":113262.91000000000349245965480804443359375,"symbol":"NZD"},"PLN":{"15m":242560.2000000000116415321826934814453125,"last":242560.2000000000116415321826934814453125,"buy":242560.2000000000116415321826934814453125,"sell":242560.2000000000116415321826934814453125,"symbol":"PLN"},"RON":{"15m":292768.5800000000162981450557708740234375,"last":292768.5800000000162981450557708740234375,"buy":292768.5800000000162981450557708740234375,"sell":292768.5800000000162981450557708740234375,"symbol":"RON"},"RUB":{"15m":5216303.059999999590218067169189453125,"last":5216303.059999999590218067169189453125,"buy":5216303.059999999590218067169189453125,"sell":5216303.05999999959021806716918945312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%} {% set shcDosc = (js1 | doshortcode) %} {% set shcArr = (shcDosc | json_decode(TRUE) ) %}
Value:

Result: {{nojsonvalue}}
In the above twig-code is “nameoftemplate=blockchaininfogetcurr”, in there is the URL https://blockchain.info/ticker and this twig
{{ _context | json_encode }}

In Action:

Value:

Result: 0.00736879