February 16-17: Japan’s Imperial Navy is forced to withdraw from Truk, its main base in the central Pacific, when Truk is subjected to a highly destructive assault by American carrier aircraft. My main issue in this part of the development was managing concurrency. To you, what is the most beautiful part of a car? This subreddit is part of the Political Revolution. If I had cottoned onto the wisdom of the common Go pattern “Make a server object with one managing go-routine and have it tightly loop on a single channel of incoming requests” earlier, I probably would have a avoided a whole lot of deadlocks, crashes, and concurrency bugs caused by e.g. reading the order book for GET /venues/FOO/symbols/BAR at the same time a match was ongoing subsequent to someone POSTing a new order. The pattern is now in the second generation. Male and female golfers alike, they have each made an impact on the sport and now we are ready for you to have an impact on this quiz. You don’t have to worry about it for the first couple of levels…
A couple of brilliant researchers out of CWI in the Netherlands were among the earliest to identify this gap. Markets are aggregation mechanisms for price signals, and they come to surprisingly sophisticated behavior even when composed out of relatively unsophisticated individual agents. Even though the Indiana Pacers haven’t made it out of the first round under his tutelage, Nate McMillan has the team playing inspired basketball. In a short seven months, the MotherDuck team has shown incredible progress toward realizing their vision. Incoming orders from the REST API or our internal message bus are passed to a single goroutine which manages ingress and egress to the order book. This goroutine writes the results of those orders to a series of tapes. But that sort of interaction – orders resting on the book, cancels, timing issues, different views on reality, profiling incoming order flow (as reflected by the quotes or execution tapes) and using it to send in or cancel orders faster than the incoming flow can itself adjust, using executions from one exchange to drive decisions to send orders to another exchange, etc, are all so fun to play with. This is a preview of coming attractions for Stockfighter: even when we aren’t explicitly making tech decisions for pedagogic purposes, modeling the complexity of the stock market is a real engineering workout versus e.g. the typical CRUD application.
Even after we have very sophisticated market makers (if that is a new word for you, I promise, you’ll understand it by the end of level 3), our idiot market makers are still valuable content for people who are still learning the field. Read operations are even faster. Most of them are cunning artifice – you’re not actually trading with another actor. But you’re hooked up to a stock exchange and all the other participants are idiots. When you put in an order, demo account olymp trade you receive the results suggested by a stock market simulation. An average crypto investor is just a normal person, the salt of the earth people who don’t know anything about technology, finance, or the history of market manias. Aside: We’ll support PVP in some levels of later chapters, for those players who enjoy it. Bonus points: most players will, at some point, choose to represent the order book on their own machines. Then my order arrived to an empty book, soaking up 0 shares. Amalgamated Cat Food (ACF) is up today – you paid $45.32 for your shares!
The only actual goal-oriented level in the game at the time was our tutorial, which just has you buy 100 shares to prove you’re mechanically capable of doing so. My order came back saying that I had bought 0 shares. The bot then replaced its order, causing the exchange to issue a new quote, which made it back to my PC before I had time to blink. That bot had an order resting on the book displayed on my screen. A market order is a special order type which doesn’t specify a price – it says “I’ll pay literally anything, I just want guaranteed execution of this order immediately.” (Aside: Stockfighter will quickly teach players in a visceral fashion why Wall Street considers people who place market orders to be idiots. An example, hopefully without spoiling too much: I did a technology preview of the game with a friend who has a Wall Street background. For example, the bugged momentum following bots which were proximately at fault for the market cascade were too disruptive to keep in that level…