Yes, because unsubscribing or filtering an e-mail is significantly more difficult than hand-coding these templates...seriously, it's an e-mail address dude.

OP - really good stuff. I hope you do extremely well.

They are not asking for my email address. They want me to log in using a Facebook, Twitter, or Google account. That means that they potentially get access to my contacts and other personal data.

Yes, I know that I can review the permission. But I don't know what bug, exploits, permission changes, or mistakes will be made. I don't want to worry about that.

If they want an email address, I'll happily provide one. But I will not "log in" to their services.

Just create a throwaway Twitter account. Won’t take you more time then explaining your unwillingness to hand over your email here.

The spreadsheet that can be downloaded actually has the amount of datapoints used for every crypto in the list.

It is a great point, and is even showcased in the section on volatility, where the LEAST volatile cryptocurrencies were highly correlated with age.

Got it. Cheers!

Hi thisisit,

Thanks for the comment. If you would have read through the entire article, you would see fees mentioned in the "pitfalls" section.

I am glad you brought up the NBBO, as it is an extremely important regulation for newer traders to understand. However, the comment on mergers and consolidations still stands...just look at the Philly Stock Exchange: https://en.wikipedia.org/wiki/Philadelphia_Stock_Exchange

I am sorry to sound condescending but if you read my post, a rather short one, I said: "and mentions it as some kind of "responsible disclosure" towards end."

Arbitrage money is net of fees between exchanges so your ELIF showing $5 profit is kind of irresponsible giving people false information. If you are concerned about your users do mention the fees in bold letters above fold.

On your question on exchanges in US, well read this:

https://www.investopedia.com/ask/answers/08/security-market-...

And it doesn't even mention IEX:

https://en.m.wikipedia.org/wiki/IEX

So no not only two exchanges in existence.

And I mentioned NBBO because it nearly removes arbitrage opportunity not because there are only "two exchanges". But if you want to change your goalpost to focus on M&A, I digress.

Hey Lord,

Thanks for the comment. I reiterated that it was not an apples-to-apples comparison for stock exchanges...but let's be honest. NYSE and Nasdaq are far and away the leaders.

Aboslutely agree on sending the orders off before someone else does. I mention that in the "pitfalls" section.

It wasn't meant to be a damning criticism.

Here is a chart of exchange volumes. It's far from a two-horse race. There are structural reasons why there will be business for more than just a couple of exchanges, and it's closely linked to arbitrage players actually.

https://www.sec.gov/marketstructure/datavis/ma_exchange_trad...

Arbitrary relies on better execution than your competitors. It isn't simply a pitfall or side issue. You really need a way to estimate slippage to make this information realistic.

If you need additional datasets, head over to https://spreadstreet.io where you can download over 3,000+ datasets across hundreds of digital currencies.

Nice article! Had a good time reading it.