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":96003722.85999999940395355224609375,"last":96003722.85999999940395355224609375,"buy":96003722.85999999940395355224609375,"sell":96003722.85999999940395355224609375,"symbol":"ARS"},"AUD":{"15m":91922.72000000000116415321826934814453125,"last":91922.72000000000116415321826934814453125,"buy":91922.72000000000116415321826934814453125,"sell":91922.72000000000116415321826934814453125,"symbol":"AUD"},"BRL":{"15m":327013.0499999999883584678173065185546875,"last":327013.0499999999883584678173065185546875,"buy":327013.0499999999883584678173065185546875,"sell":327013.0499999999883584678173065185546875,"symbol":"BRL"},"CAD":{"15m":90466.89999999999417923390865325927734375,"last":90466.89999999999417923390865325927734375,"buy":90466.89999999999417923390865325927734375,"sell":90466.89999999999417923390865325927734375,"symbol":"CAD"},"CHF":{"15m":52501.58999999999650754034519195556640625,"last":52501.58999999999650754034519195556640625,"buy":52501.58999999999650754034519195556640625,"sell":52501.58999999999650754034519195556640625,"symbol":"CHF"},"CLP":{"15m":60812469.810000002384185791015625,"last":60812469.810000002384185791015625,"buy":60812469.810000002384185791015625,"sell":60812469.810000002384185791015625,"symbol":"CLP"},"CNY":{"15m":434456.349999999976716935634613037109375,"last":434456.349999999976716935634613037109375,"buy":434456.349999999976716935634613037109375,"sell":434456.349999999976716935634613037109375,"symbol":"CNY"},"CZK":{"15m":1361690.53000000002793967723846435546875,"last":1361690.53000000002793967723846435546875,"buy":1361690.53000000002793967723846435546875,"sell":1361690.53000000002793967723846435546875,"symbol":"CZK"},"DKK":{"15m":421818.2299999999813735485076904296875,"last":421818.2299999999813735485076904296875,"buy":421818.2299999999813735485076904296875,"sell":421818.2299999999813735485076904296875,"symbol":"DKK"},"EUR":{"15m":56423.1900000000023283064365386962890625,"last":56423.1900000000023283064365386962890625,"buy":56423.1900000000023283064365386962890625,"sell":56423.1900000000023283064365386962890625,"symbol":"EUR"},"GBP":{"15m":48159.77999999999883584678173065185546875,"last":48159.77999999999883584678173065185546875,"buy":48159.77999999999883584678173065185546875,"sell":48159.77999999999883584678173065185546875,"symbol":"GBP"},"GHS":{"15m":781789.459999999962747097015380859375,"last":781789.459999999962747097015380859375,"buy":781789.459999999962747097015380859375,"sell":781789.459999999962747097015380859375,"symbol":"GHS"},"HKD":{"15m":503108.9500000000116415321826934814453125,"last":503108.9500000000116415321826934814453125,"buy":503108.9500000000116415321826934814453125,"sell":503108.9500000000116415321826934814453125,"symbol":"HKD"},"HRK":{"15m":295915.890000000013969838619232177734375,"last":295915.890000000013969838619232177734375,"buy":295915.890000000013969838619232177734375,"sell":295915.890000000013969838619232177734375,"symbol":"HRK"},"HUF":{"15m":20392135.679999999701976776123046875,"last":20392135.679999999701976776123046875,"buy":20392135.679999999701976776123046875,"sell":20392135.679999999701976776123046875,"symbol":"HUF"},"INR":{"15m":6184189.950000000186264514923095703125,"last":6184189.950000000186264514923095703125,"buy":6184189.950000000186264514923095703125,"sell":6184189.950000000186264514923095703125,"symbol":"INR"},"ISK":{"15m":8069154.5199999995529651641845703125,"last":8069154.5199999995529651641845703125,"buy":8069154.5199999995529651641845703125,"sell":8069154.5199999995529651641845703125,"symbol":"ISK"},"JPY":{"15m":10511679.1600000001490116119384765625,"last":10511679.1600000001490116119384765625,"buy":10511679.1600000001490116119384765625,"sell":10511679.1600000001490116119384765625,"symbol":"JPY"},"KRW":{"15m":93700449.26999999582767486572265625,"last":93700449.26999999582767486572265625,"buy":93700449.26999999582767486572265625,"sell":93700449.26999999582767486572265625,"symbol":"KRW"},"NGN":{"15m":89706973.4699999988079071044921875,"last":89706973.4699999988079071044921875,"buy":89706973.4699999988079071044921875,"sell":89706973.4699999988079071044921875,"symbol":"NGN"},"NZD":{"15m":110833.97000000000116415321826934814453125,"last":110833.97000000000116415321826934814453125,"buy":110833.97000000000116415321826934814453125,"sell":110833.97000000000116415321826934814453125,"symbol":"NZD"},"PLN":{"15m":243607.85000000000582076609134674072265625,"last":243607.85000000000582076609134674072265625,"buy":243607.85000000000582076609134674072265625,"sell":243607.85000000000582076609134674072265625,"symbol":"PLN"},"RON":{"15m":293839.5800000000162981450557708740234375,"last":293839.5800000000162981450557708740234375,"buy":293839.5800000000162981450557708740234375,"sell":293839.5800000000162981450557708740234375,"symbol":"RON"},"RUB":{"15m":4980926.450000000186264514923095703125,"last":4980926.450000000186264514923095703125,"buy":4980926.450000000186264514923095703125,"sell":4980926.450000000186264514923095703125,"symbol":"RUB"},"SEK":{"15m":6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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: 0.00779388