How to get the low value of the following api :
[{"idreg":"257052","code":"USD","codein":"BRL","name":"D\u00f3lar Comercial",
"high":"3.4026","pctChange":"1.143","open":"0","bid":"3.3703","ask":"3.3713",
"timestamp":"148182...
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15.12.2016 / 20:45