Replace this :
<div *ngFor="let price of prices">
High : {{price.High}} , Low : {{price.Low}}
</div>
You were trying to print array of obejcts prices, It should be price not prices
High : {{price.High}} , Low : {{price.Low}}
Like this you can access any of the given values :
{
"MarketName": "BTC-ZEC",
"High": 0.16290000,
"Low": 0.13087156,
"Volume": 12760.98721068,
"Last": 0.15650003,
"BaseVolume": 1908.20341779,
"TimeStamp": "2017-06-14T19:15:25.57",
"Bid": 0.15650003,
"Ask": 0.15786551,
"OpenBuyOrders": 1130,
"OpenSellOrders": 1257,
"PrevDay": 0.13380000,
"Created": "2016-10-28T17:13:10.833"
}
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