It depends on your employer. International banks are present in all major cities. So English is mainstream. And you do not need to be in Tokyo for that. The most important thing is where your trading computers are. Plus mind that hft and algorithmic trading are not the same things. Hft is proptrading which is now mostly forbidden for large international banks by Volker rule.
Correct. And it is not just Investopedia who is misleading. Type Algorithmic trading in amazon search and you will see tens of books on this topic that have nothing to do with algorithmic trading. No wonder some people are claiming they are doing algorithmictrading and even high frequency trading using their laptops from their bedrooms.
Investopedia makes the same mistake. When you sleep and computer makes you some money, it's automated trading, systematic trading, mechanical trading. This kind of trading was in the industry for centuries: you incent some rules and follow them. Algoritmic trading is about executing large orders by slicing them and filling them thru a trading day. These are the terms seriours industry professionals are using. If you apply for algo trading job in a bank you will not be writing a cash making bot.
I've been working in the industry in Tokyo for 15 years. And why should we care how everyone else uses the terms if we are professionals? Even the document's title says Automated trading.
Algorithmic trading means the same in chicago new york tokyo hongkong or london. Even in singapore and sydney. Same thing: slicing the order to minimize the impact