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":116534052.39000000059604644775390625,"last":116534052.39000000059604644775390625,"buy":116534052.39000000059604644775390625,"sell":116534052.39000000059604644775390625,"symbol":"ARS"},"AUD":{"15m":108331.139999999999417923390865325927734375,"last":108331.139999999999417923390865325927734375,"buy":108331.139999999999417923390865325927734375,"sell":108331.139999999999417923390865325927734375,"symbol":"AUD"},"BRL":{"15m":399286.3400000000256113708019256591796875,"last":399286.3400000000256113708019256591796875,"buy":399286.3400000000256113708019256591796875,"sell":399286.3400000000256113708019256591796875,"symbol":"BRL"},"CAD":{"15m":107137.289999999993597157299518585205078125,"last":107137.289999999993597157299518585205078125,"buy":107137.289999999993597157299518585205078125,"sell":107137.289999999993597157299518585205078125,"symbol":"CAD"},"CHF":{"15m":62216.4800000000032014213502407073974609375,"last":62216.4800000000032014213502407073974609375,"buy":62216.4800000000032014213502407073974609375,"sell":62216.4800000000032014213502407073974609375,"symbol":"CHF"},"CLP":{"15m":71377179.7199999988079071044921875,"last":71377179.7199999988079071044921875,"buy":71377179.7199999988079071044921875,"sell":71377179.7199999988079071044921875,"symbol":"CLP"},"CNY":{"15m":522066.3200000000069849193096160888671875,"last":522066.3200000000069849193096160888671875,"buy":522066.3200000000069849193096160888671875,"sell":522066.3200000000069849193096160888671875,"symbol":"CNY"},"CZK":{"15m":1603810.88999999989755451679229736328125,"last":1603810.88999999989755451679229736328125,"buy":1603810.88999999989755451679229736328125,"sell":1603810.88999999989755451679229736328125,"symbol":"CZK"},"DKK":{"15m":497203.650000000023283064365386962890625,"last":497203.650000000023283064365386962890625,"buy":497203.650000000023283064365386962890625,"sell":497203.650000000023283064365386962890625,"symbol":"DKK"},"EUR":{"15m":66508.27999999999883584678173065185546875,"last":66508.27999999999883584678173065185546875,"buy":66508.27999999999883584678173065185546875,"sell":66508.27999999999883584678173065185546875,"symbol":"EUR"},"GBP":{"15m":56926.02999999999883584678173065185546875,"last":56926.02999999999883584678173065185546875,"buy":56926.02999999999883584678173065185546875,"sell":56926.02999999999883584678173065185546875,"symbol":"GBP"},"GHS":{"15m":927925.829999999958090484142303466796875,"last":927925.829999999958090484142303466796875,"buy":927925.829999999958090484142303466796875,"sell":927925.829999999958090484142303466796875,"symbol":"GHS"},"HKD":{"15m":608971.319999999948777258396148681640625,"last":608971.319999999948777258396148681640625,"buy":608971.319999999948777258396148681640625,"sell":608971.319999999948777258396148681640625,"symbol":"HKD"},"HRK":{"15m":358284.099999999976716935634613037109375,"last":358284.099999999976716935634613037109375,"buy":358284.099999999976716935634613037109375,"sell":358284.099999999976716935634613037109375,"symbol":"HRK"},"HUF":{"15m":24119126.1200000010430812835693359375,"last":24119126.1200000010430812835693359375,"buy":24119126.1200000010430812835693359375,"sell":24119126.1200000010430812835693359375,"symbol":"HUF"},"INR":{"15m":7432403.90000000037252902984619140625,"last":7432403.90000000037252902984619140625,"buy":7432403.90000000037252902984619140625,"sell":7432403.90000000037252902984619140625,"symbol":"INR"},"ISK":{"15m":9417196.460000000894069671630859375,"last":9417196.460000000894069671630859375,"buy":9417196.460000000894069671630859375,"sell":9417196.460000000894069671630859375,"symbol":"ISK"},"JPY":{"15m":12342669.2699999995529651641845703125,"last":12342669.2699999995529651641845703125,"buy":12342669.2699999995529651641845703125,"sell":12342669.2699999995529651641845703125,"symbol":"JPY"},"KRW":{"15m":107664459.5,"last":107664459.5,"buy":107664459.5,"sell":107664459.5,"symbol":"KRW"},"NGN":{"15m":108432986.689999997615814208984375,"last":108432986.689999997615814208984375,"buy":108432986.689999997615814208984375,"sell":108432986.689999997615814208984375,"symbol":"NGN"},"NZD":{"15m":129959.14999999999417923390865325927734375,"last":129959.14999999999417923390865325927734375,"buy":129959.14999999999417923390865325927734375,"sell":129959.14999999999417923390865325927734375,"symbol":"NZD"},"PLN":{"15m":286765.619999999995343387126922607421875,"last":286765.619999999995343387126922607421875,"buy":286765.619999999995343387126922607421875,"sell":286765.619999999995343387126922607421875,"symbol":"PLN"},"RON":{"15m":352570.0200000000186264514923095703125,"last":352570.0200000000186264514923095703125,"buy":352570.0200000000186264514923095703125,"sell":352570.0200000000186264514923095703125,"symbol":"RON"},"RUB":{"15m":6427295.059999999590218067169189453125,"last":6427295.059999999590218067169189453125,"buy":6427295.059999999590218067169189453125,"sell":6427295.059999999590218067169189453125,"symbol":"RUB"},"SEK":{"15m":735902.900000000023283064365386962890625,"last":735902.9000000000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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: 0.00643716