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 = '{"USD":{"15m":36595.41000000000349245965480804443359375,"last":36595.41000000000349245965480804443359375,"buy":36595.41000000000349245965480804443359375,"sell":36595.41000000000349245965480804443359375,"symbol":"$"},"AUD":{"15m":47509.919999999998253770172595977783203125,"last":47509.919999999998253770172595977783203125,"buy":47509.919999999998253770172595977783203125,"sell":47509.919999999998253770172595977783203125,"symbol":"$"},"BRL":{"15m":193703.1799999999930150806903839111328125,"last":193703.1799999999930150806903839111328125,"buy":193703.1799999999930150806903839111328125,"sell":193703.1799999999930150806903839111328125,"symbol":"R$"},"CAD":{"15m":46612.639999999999417923390865325927734375,"last":46612.639999999999417923390865325927734375,"buy":46612.639999999999417923390865325927734375,"sell":46612.639999999999417923390865325927734375,"symbol":"$"},"CHF":{"15m":32620.9300000000002910383045673370361328125,"last":32620.9300000000002910383045673370361328125,"buy":32620.9300000000002910383045673370361328125,"sell":32620.9300000000002910383045673370361328125,"symbol":"CHF"},"CLP":{"15m":26890301.7600000016391277313232421875,"last":26890301.7600000016391277313232421875,"buy":26890301.7600000016391277313232421875,"sell":26890301.7600000016391277313232421875,"symbol":"$"},"CNY":{"15m":237167.5499999999883584678173065185546875,"last":237167.5499999999883584678173065185546875,"buy":237167.5499999999883584678173065185546875,"sell":237167.5499999999883584678173065185546875,"symbol":"\u00a5"},"DKK":{"15m":225447.869999999995343387126922607421875,"last":225447.869999999995343387126922607421875,"buy":225447.869999999995343387126922607421875,"sell":225447.869999999995343387126922607421875,"symbol":"kr"},"EUR":{"15m":30342.50999999999839928932487964630126953125,"last":30342.50999999999839928932487964630126953125,"buy":30342.50999999999839928932487964630126953125,"sell":30342.50999999999839928932487964630126953125,"symbol":"\u20ac"},"GBP":{"15m":26931.1500000000014551915228366851806640625,"last":26931.1500000000014551915228366851806640625,"buy":26931.1500000000014551915228366851806640625,"sell":26931.1500000000014551915228366851806640625,"symbol":"\u00a3"},"HKD":{"15m":283737.0399999999790452420711517333984375,"last":283737.0399999999790452420711517333984375,"buy":283737.0399999999790452420711517333984375,"sell":283737.0399999999790452420711517333984375,"symbol":"$"},"INR":{"15m":2677375.2700000000186264514923095703125,"last":2677375.2700000000186264514923095703125,"buy":2677375.2700000000186264514923095703125,"sell":2677375.2700000000186264514923095703125,"symbol":"\u20b9"},"ISK":{"15m":4745693.0899999998509883880615234375,"last":4745693.0899999998509883880615234375,"buy":4745693.0899999998509883880615234375,"sell":4745693.0899999998509883880615234375,"symbol":"kr"},"JPY":{"15m":3798211.7200000002048909664154052734375,"last":3798211.7200000002048909664154052734375,"buy":3798211.7200000002048909664154052734375,"sell":3798211.7200000002048909664154052734375,"symbol":"\u00a5"},"KRW":{"15m":40410850.2199999988079071044921875,"last":40410850.2199999988079071044921875,"buy":40410850.2199999988079071044921875,"sell":40410850.2199999988079071044921875,"symbol":"\u20a9"},"NZD":{"15m":51326.6800000000002910383045673370361328125,"last":51326.6800000000002910383045673370361328125,"buy":51326.6800000000002910383045673370361328125,"sell":51326.6800000000002910383045673370361328125,"symbol":"$"},"PLN":{"15m":137426.390000000013969838619232177734375,"last":137426.390000000013969838619232177734375,"buy":137426.390000000013969838619232177734375,"sell":137426.390000000013969838619232177734375,"symbol":"z\u0142"},"RUB":{"15m":2689850.6099999998696148395538330078125,"last":2689850.6099999998696148395538330078125,"buy":2689850.6099999998696148395538330078125,"sell":2689850.6099999998696148395538330078125,"symbol":"RUB"},"SEK":{"15m":307797.609999999986030161380767822265625,"last":307797.609999999986030161380767822265625,"buy":307797.609999999986030161380767822265625,"sell":307797.609999999986030161380767822265625,"symbol":"kr"},"SGD":{"15m":48682.8799999999973806552588939666748046875,"last":48682.8799999999973806552588939666748046875,"buy":48682.8799999999973806552588939666748046875,"sell":48682.8799999999973806552588939666748046875,"symbol":"$"},"THB":{"15m":1101532.459999999962747097015380859375,"last":1101532.459999999962747097015380859375,"buy":1101532.459999999962747097015380859375,"sell":1101532.459999999962747097015380859375,"symbol":"\u0e3f"},"TRY":{"15m":273327.4799999999813735485076904296875,"last":273327.4799999999813735485076904296875,"buy":273327.4799999999813735485076904296875,"sell":273327.4799999999813735485076904296875,"symbol":"\u20ba"},"TWD":{"15m":1024572.73999999999068677425384521484375,"last":1024572.73999999999068677425384521484375,"buy":1024572.73999999999068677425384521484375,"sell":1024572.73999999999068677425384521484375,"symbol":"NT$"}}' %}
{% 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: 0.01366291