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 = '{"AUD":{"15m":65565.479999999995925463736057281494140625,"last":65565.479999999995925463736057281494140625,"buy":65565.479999999995925463736057281494140625,"sell":65565.479999999995925463736057281494140625,"symbol":"AUD"},"BRL":{"15m":252707.4400000000023283064365386962890625,"last":252707.4400000000023283064365386962890625,"buy":252707.4400000000023283064365386962890625,"sell":252707.4400000000023283064365386962890625,"symbol":"BRL"},"CAD":{"15m":60611.4599999999991268850862979888916015625,"last":60611.4599999999991268850862979888916015625,"buy":60611.4599999999991268850862979888916015625,"sell":60611.4599999999991268850862979888916015625,"symbol":"CAD"},"CHF":{"15m":44278.6500000000014551915228366851806640625,"last":44278.6500000000014551915228366851806640625,"buy":44278.6500000000014551915228366851806640625,"sell":44278.6500000000014551915228366851806640625,"symbol":"CHF"},"CLP":{"15m":37662605.810000002384185791015625,"last":37662605.810000002384185791015625,"buy":37662605.810000002384185791015625,"sell":37662605.810000002384185791015625,"symbol":"CLP"},"CNY":{"15m":314805.3400000000256113708019256591796875,"last":314805.3400000000256113708019256591796875,"buy":314805.3400000000256113708019256591796875,"sell":314805.3400000000256113708019256591796875,"symbol":"CNY"},"CZK":{"15m":1024470.98999999999068677425384521484375,"last":1024470.98999999999068677425384521484375,"buy":1024470.98999999999068677425384521484375,"sell":1024470.98999999999068677425384521484375,"symbol":"CZK"},"DKK":{"15m":291438.5200000000186264514923095703125,"last":291438.5200000000186264514923095703125,"buy":291438.5200000000186264514923095703125,"sell":291438.5200000000186264514923095703125,"symbol":"DKK"},"EUR":{"15m":40556.6200000000026193447411060333251953125,"last":40556.6200000000026193447411060333251953125,"buy":40556.6200000000026193447411060333251953125,"sell":40556.6200000000026193447411060333251953125,"symbol":"EUR"},"GBP":{"15m":34564.2399999999979627318680286407470703125,"last":34564.2399999999979627318680286407470703125,"buy":34564.2399999999979627318680286407470703125,"sell":34564.2399999999979627318680286407470703125,"symbol":"GBP"},"HKD":{"15m":369124.0900000000256113708019256591796875,"last":369124.0900000000256113708019256591796875,"buy":369124.0900000000256113708019256591796875,"sell":369124.0900000000256113708019256591796875,"symbol":"HKD"},"INR":{"15m":3639054.049999999813735485076904296875,"last":3639054.049999999813735485076904296875,"buy":3639054.049999999813735485076904296875,"sell":3639054.049999999813735485076904296875,"symbol":"INR"},"ISK":{"15m":9849928.4499999992549419403076171875,"last":9849928.4499999992549419403076171875,"buy":9849928.4499999992549419403076171875,"sell":9849928.4499999992549419403076171875,"symbol":"ISK"},"JPY":{"15m":5232514.360000000335276126861572265625,"last":5232514.360000000335276126861572265625,"buy":5232514.360000000335276126861572265625,"sell":5232514.360000000335276126861572265625,"symbol":"JPY"},"KRW":{"15m":57067464.64000000059604644775390625,"last":57067464.64000000059604644775390625,"buy":57067464.64000000059604644775390625,"sell":57067464.64000000059604644775390625,"symbol":"KRW"},"NZD":{"15m":67486.3099999999976716935634613037109375,"last":67486.3099999999976716935634613037109375,"buy":67486.3099999999976716935634613037109375,"sell":67486.3099999999976716935634613037109375,"symbol":"NZD"},"PLN":{"15m":185503.390000000013969838619232177734375,"last":185503.390000000013969838619232177734375,"buy":185503.390000000013969838619232177734375,"sell":185503.390000000013969838619232177734375,"symbol":"PLN"},"RUB":{"15m":3462540.2299999999813735485076904296875,"last":3462540.2299999999813735485076904296875,"buy":3462540.2299999999813735485076904296875,"sell":3462540.2299999999813735485076904296875,"symbol":"RUB"},"SEK":{"15m":446970.650000000023283064365386962890625,"last":446970.650000000023283064365386962890625,"buy":446970.650000000023283064365386962890625,"sell":446970.650000000023283064365386962890625,"symbol":"SEK"},"SGD":{"15m":63594.7600000000020372681319713592529296875,"last":63594.7600000000020372681319713592529296875,"buy":63594.7600000000020372681319713592529296875,"sell":63594.7600000000020372681319713592529296875,"symbol":"SGD"},"THB":{"15m":1591015.36000000010244548320770263671875,"last":1591015.36000000010244548320770263671875,"buy":1591015.36000000010244548320770263671875,"sell":1591015.36000000010244548320770263671875,"symbol":"THB"},"TWD":{"15m":1452975.19999999995343387126922607421875,"last":1452975.19999999995343387126922607421875,"buy":1452975.19999999995343387126922607421875,"sell":1452975.19999999995343387126922607421875,"symbol":"TWD"},"USD":{"15m":47698.6500000000014551915228366851806640625,"last":47698.6500000000014551915228366851806640625,"buy":47698.6500000000014551915228366851806640625,"sell":47698.6500000000014551915228366851806640625,"symbol":"USD"}}' %}
{% 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: 0.01048248