refresh(){
    let self = this
    async.eachSeries(self.coins, async(item, callback)=>{
        if(self.onRefresh){
            self.onRefresh(await self.priceMulti(item, "EUR,USD,BTC"))
        }
        await self.delay(self.priceRefreshFrequency)
    },
    async (error) => {
        self.coins = self.parseCoins(await self.coinsList())
        self.refresh()
    })
}