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":126225887.75,"last":126225887.75,"buy":126225887.75,"sell":126225887.75,"symbol":"ARS"},"AUD":{"15m":119112.89999999999417923390865325927734375,"last":119112.89999999999417923390865325927734375,"buy":119112.89999999999417923390865325927734375,"sell":119112.89999999999417923390865325927734375,"symbol":"AUD"},"BRL":{"15m":419386.900000000023283064365386962890625,"last":419386.900000000023283064365386962890625,"buy":419386.900000000023283064365386962890625,"sell":419386.900000000023283064365386962890625,"symbol":"BRL"},"CAD":{"15m":118540.169999999998253770172595977783203125,"last":118540.169999999998253770172595977783203125,"buy":118540.169999999998253770172595977783203125,"sell":118540.169999999998253770172595977783203125,"symbol":"CAD"},"CHF":{"15m":69441.369999999995343387126922607421875,"last":69441.369999999995343387126922607421875,"buy":69441.369999999995343387126922607421875,"sell":69441.369999999995343387126922607421875,"symbol":"CHF"},"CLP":{"15m":81772812.07999999821186065673828125,"last":81772812.07999999821186065673828125,"buy":81772812.07999999821186065673828125,"sell":81772812.07999999821186065673828125,"symbol":"CLP"},"CNY":{"15m":558248.28000000002793967723846435546875,"last":558248.28000000002793967723846435546875,"buy":558248.28000000002793967723846435546875,"sell":558248.28000000002793967723846435546875,"symbol":"CNY"},"CZK":{"15m":1813331.0200000000186264514923095703125,"last":1813331.0200000000186264514923095703125,"buy":1813331.0200000000186264514923095703125,"sell":1813331.0200000000186264514923095703125,"symbol":"CZK"},"DKK":{"15m":556530.839999999967403709888458251953125,"last":556530.839999999967403709888458251953125,"buy":556530.839999999967403709888458251953125,"sell":556530.839999999967403709888458251953125,"symbol":"DKK"},"EUR":{"15m":74450.039999999993597157299518585205078125,"last":74450.039999999993597157299518585205078125,"buy":74450.039999999993597157299518585205078125,"sell":74450.039999999993597157299518585205078125,"symbol":"EUR"},"GBP":{"15m":62898.860000000000582076609134674072265625,"last":62898.860000000000582076609134674072265625,"buy":62898.860000000000582076609134674072265625,"sell":62898.860000000000582076609134674072265625,"symbol":"GBP"},"GHS":{"15m":1016527.040000000037252902984619140625,"last":1016527.040000000037252902984619140625,"buy":1016527.040000000037252902984619140625,"sell":1016527.040000000037252902984619140625,"symbol":"GHS"},"HKD":{"15m":654640.44999999995343387126922607421875,"last":654640.44999999995343387126922607421875,"buy":654640.44999999995343387126922607421875,"sell":654640.44999999995343387126922607421875,"symbol":"HKD"},"HRK":{"15m":384766.640000000013969838619232177734375,"last":384766.640000000013969838619232177734375,"buy":384766.640000000013969838619232177734375,"sell":384766.640000000013969838619232177734375,"symbol":"HRK"},"HUF":{"15m":27071829.9100000001490116119384765625,"last":27071829.9100000001490116119384765625,"buy":27071829.9100000001490116119384765625,"sell":27071829.9100000001490116119384765625,"symbol":"HUF"},"INR":{"15m":7924421.120000000111758708953857421875,"last":7924421.120000000111758708953857421875,"buy":7924421.120000000111758708953857421875,"sell":7924421.120000000111758708953857421875,"symbol":"INR"},"ISK":{"15m":10139960.4100000001490116119384765625,"last":10139960.4100000001490116119384765625,"buy":10139960.4100000001490116119384765625,"sell":10139960.4100000001490116119384765625,"symbol":"ISK"},"JPY":{"15m":13201298.81000000052154064178466796875,"last":13201298.81000000052154064178466796875,"buy":13201298.81000000052154064178466796875,"sell":13201298.81000000052154064178466796875,"symbol":"JPY"},"KRW":{"15m":111405056,"last":111405056,"buy":111405056,"sell":111405056,"symbol":"KRW"},"NGN":{"15m":113781814.95000000298023223876953125,"last":113781814.95000000298023223876953125,"buy":113781814.95000000298023223876953125,"sell":113781814.95000000298023223876953125,"symbol":"NGN"},"NZD":{"15m":148308.32999999998719431459903717041015625,"last":148308.32999999998719431459903717041015625,"buy":148308.32999999998719431459903717041015625,"sell":148308.32999999998719431459903717041015625,"symbol":"NZD"},"PLN":{"15m":325398.4199999999837018549442291259765625,"last":325398.4199999999837018549442291259765625,"buy":325398.4199999999837018549442291259765625,"sell":325398.4199999999837018549442291259765625,"symbol":"PLN"},"RON":{"15m":397507.119999999995343387126922607421875,"last":397507.119999999995343387126922607421875,"buy":397507.119999999995343387126922607421875,"sell":397507.119999999995343387126922607421875,"symbol":"RON"},"RUB":{"15m":7001708.049999999813735485076904296875,"last":7001708.049999999813735485076904296875,"buy":7001708.049999999813735485076904296875,"sell":7001708.049999999813735485076904296875,"symbol":"RUB"},"SEK":{"15m":829939.859999999986030161380767822265625,"last":829939.859999999986030161380767822265625,"buy":829939.859999999986030161380767822265625,"sell":829939.8599999999860301613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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: 0.00599411