I follow Coinbase (and several other exchanges) on Twitter with notifications turned on. Also subscribed to the Coinbase blog on the Medium app with notifications turned on. They announced it a couple days before. I guess I missed that this time probably at work just clearing notifications without looking at them.
But the Twitter alert woke me up out of bed. I quickly looked at the three coins being listed in terms of market cap and how long they'd been around and immediately bought SKL. It went almost 2x and then dropped back down, but long term I think it'll go 3-4x. Not only that but it's low marketcap and if you've been really following charts you'll see low marketcap coins randomly getting pump and dumped, so even if it doesn't trend upwards there's a good chance eventually it will get pumped and with a sell order set it'll sell even if I'm not watching it.
Haven't tried this one yet, but there's also this for alerts.
Code:
https://cryptocurrencyalerting.com/new-coin-listings.html
Looks like they just announce when something gets listed instead of before. Coinbase Twitter usually announces right before listing, the blog is a few days before. But anyway that site has a lot of exchanges. I was looking at various coins listing times and the charts on that day and it's pretty universal that they pump. Most peak really briefly and then drop back to their previous value, but it's consistent.
It's been dipping like this pretty much every Sunday forever now with the biggest corrections around the end of January and February. It's not over yet.