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":94468141.01000000536441802978515625,"last":94468141.01000000536441802978515625,"buy":94468141.01000000536441802978515625,"sell":94468141.01000000536441802978515625,"symbol":"ARS"},"AUD":{"15m":91294.9400000000023283064365386962890625,"last":91294.9400000000023283064365386962890625,"buy":91294.9400000000023283064365386962890625,"sell":91294.9400000000023283064365386962890625,"symbol":"AUD"},"BRL":{"15m":328606.3099999999976716935634613037109375,"last":328606.3099999999976716935634613037109375,"buy":328606.3099999999976716935634613037109375,"sell":328606.3099999999976716935634613037109375,"symbol":"BRL"},"CAD":{"15m":89992.10000000000582076609134674072265625,"last":89992.10000000000582076609134674072265625,"buy":89992.10000000000582076609134674072265625,"sell":89992.10000000000582076609134674072265625,"symbol":"CAD"},"CHF":{"15m":50897.080000000001746229827404022216796875,"last":50897.080000000001746229827404022216796875,"buy":50897.080000000001746229827404022216796875,"sell":50897.080000000001746229827404022216796875,"symbol":"CHF"},"CLP":{"15m":58451926.8400000035762786865234375,"last":58451926.8400000035762786865234375,"buy":58451926.8400000035762786865234375,"sell":58451926.8400000035762786865234375,"symbol":"CLP"},"CNY":{"15m":429968.23999999999068677425384521484375,"last":429968.23999999999068677425384521484375,"buy":429968.23999999999068677425384521484375,"sell":429968.23999999999068677425384521484375,"symbol":"CNY"},"CZK":{"15m":1340086.59000000008381903171539306640625,"last":1340086.59000000008381903171539306640625,"buy":1340086.59000000008381903171539306640625,"sell":1340086.59000000008381903171539306640625,"symbol":"CZK"},"DKK":{"15m":414206.390000000013969838619232177734375,"last":414206.390000000013969838619232177734375,"buy":414206.390000000013969838619232177734375,"sell":414206.390000000013969838619232177734375,"symbol":"DKK"},"EUR":{"15m":55397.02999999999883584678173065185546875,"last":55397.02999999999883584678173065185546875,"buy":55397.02999999999883584678173065185546875,"sell":55397.02999999999883584678173065185546875,"symbol":"EUR"},"GBP":{"15m":47452.02999999999883584678173065185546875,"last":47452.02999999999883584678173065185546875,"buy":47452.02999999999883584678173065185546875,"sell":47452.02999999999883584678173065185546875,"symbol":"GBP"},"GHS":{"15m":758394.569999999948777258396148681640625,"last":758394.569999999948777258396148681640625,"buy":758394.569999999948777258396148681640625,"sell":758394.569999999948777258396148681640625,"symbol":"GHS"},"HKD":{"15m":497169.98999999999068677425384521484375,"last":497169.98999999999068677425384521484375,"buy":497169.98999999999068677425384521484375,"sell":497169.98999999999068677425384521484375,"symbol":"HKD"},"HRK":{"15m":292336.630000000004656612873077392578125,"last":292336.630000000004656612873077392578125,"buy":292336.630000000004656612873077392578125,"sell":292336.630000000004656612873077392578125,"symbol":"HRK"},"HUF":{"15m":19577773.5,"last":19577773.5,"buy":19577773.5,"sell":19577773.5,"symbol":"HUF"},"INR":{"15m":6034468.639999999664723873138427734375,"last":6034468.639999999664723873138427734375,"buy":6034468.639999999664723873138427734375,"sell":6034468.639999999664723873138427734375,"symbol":"INR"},"ISK":{"15m":7980426.74000000022351741790771484375,"last":7980426.74000000022351741790771484375,"buy":7980426.74000000022351741790771484375,"sell":7980426.74000000022351741790771484375,"symbol":"ISK"},"JPY":{"15m":10227837.68999999947845935821533203125,"last":10227837.68999999947845935821533203125,"buy":10227837.68999999947845935821533203125,"sell":10227837.68999999947845935821533203125,"symbol":"JPY"},"KRW":{"15m":96889096.12000000476837158203125,"last":96889096.12000000476837158203125,"buy":96889096.12000000476837158203125,"sell":96889096.12000000476837158203125,"symbol":"KRW"},"NGN":{"15m":87956663.2800000011920928955078125,"last":87956663.2800000011920928955078125,"buy":87956663.2800000011920928955078125,"sell":87956663.2800000011920928955078125,"symbol":"NGN"},"NZD":{"15m":111051.3099999999976716935634613037109375,"last":111051.3099999999976716935634613037109375,"buy":111051.3099999999976716935634613037109375,"sell":111051.3099999999976716935634613037109375,"symbol":"NZD"},"PLN":{"15m":237751.45999999999185092747211456298828125,"last":237751.45999999999185092747211456298828125,"buy":237751.45999999999185092747211456298828125,"sell":237751.45999999999185092747211456298828125,"symbol":"PLN"},"RON":{"15m":289505.9099999999743886291980743408203125,"last":289505.9099999999743886291980743408203125,"buy":289505.9099999999743886291980743408203125,"sell":289505.9099999999743886291980743408203125,"symbol":"RON"},"RUB":{"15m":4889271.820000000298023223876953125,"last":4889271.820000000298023223876953125,"buy":4889271.820000000298023223876953125,"sell":4889271.820000000298023223876953125,"symbol":"RUB"},"SEK":{"15m":612098.380000000004656612873077392578125,"last":612098.380000000004656612873077392578125,"buy":612098.3800000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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: 0.0078893