Bugs happen, have back-up systems

摘要

Even the best design, coding, testing and implementation can have issues. For example, the authors' automated trading program experienced a bug in its trading process that affected its risk management exits after running successfully with no glitches for nearly a year of live trading. Fortunately only one account was impacted, but over a four-day period this account lost about $30,000, more than half of its equity. The bug in the program was corrected, and additional alerting was put in place to notify the trader should similar issues arise.