"Order sent" — but the broker never took it
Our bot announced that an order had been sent. The broker had rejected it. The bot was reporting what it tried to do, not what actually happened.
· 2 min read
Approach
Infrastructure
Lots or units? The same order, ten times the size
One broker API reads the order quantity as lots, another as units. The same code placed one lot on one account and ten on the other.
· 2 min read
The server ran out of memory in the middle of an order
A small cloud server ran out of memory at the busiest minute of the day. The operating system killed the bot halfway through placing an order, and the restart nearly placed it again.
· 3 min read