FYS Version 4.2.1 was released to prod. This version mainly addresses an issue that was introduced by a change in a third-party data source. The issue actually broke FYS, which means I had spent most of the morning debugging and not trading. These types of issues don’t happen too often, but they do happen. Since the beginnings of FYS, there might have been may two other instances. The good news is that it is all fixed. I am back trading today.