Querying 30 day historical pricing of BTC, XMR and XRP using CryptoCompare

Get-CryptoPricing.ps1

#The PriceHistorical Endpoint of cryptoCompare requires you pass in a Unix Time Stamp value.
#the unix TimeStamp works by setting the time of January 1st, 1970 as time 0.  To this, seconds are added to resolve to the current date
#for instance, the date of November 29th, 2017 adds 1.5 Billion seconds to the origin time

#First, do some time math to get a Unix TimeStamp equal to 30 days ago
$30DayAgo = (get-date).AddDays(-30)
[datetime]$origin = '1970-01-01 00:00:00'
$ts = ($30DayAgo - $origin).TotalSeconds -as [int]

Write-host "Querying historical pricing for coins on date `n`t"
$origin.AddSeconds($ts.TotalSeconds)
$price = New-Object System.Collections.ArrayList
#Next, for each symbol (Eth, Ripple and Monero), get a comparison of 30 days ago and compare to USD and BTC

ForEach ($coin in @('ETH','XRP','XMR')){
$uri = "https://min-api.cryptocompare.com/data/pricehistorical?fsym=$coin&tsyms=BTC,USD&ts=$ts&extraParams=Stephen"
$request = invoke-restmethod $uri

[void]$price.Add([pscustomobject]@{
 'CoinName' = $coin
 'BitCoinValue' =  $request.$coin.BTC
 'USDCoinValue' =  $request.$coin.USD 
})

}

$price | Format-Table

##returns

#Querying historical pricing for coins on date Thursday, January 1, 1970 12:00:00 AM
#
#CoinName BitCoinValue USDCoinValue
#-------- ------------ ------------
#ETH           0.04339       427.42
#XRP        0.00002419       0.2353
#XMR           0.01711       167.71