Uh oh! Semi-critical error:


I've noticed an identical error in cryptrade, so I'm guessing the actual error string is from cex itself, so maybe cex skips the odd nonce.
Difference is: when this happens, cryptrade carries right on regardless, but gekko hangs.
What it (probably) needs is to increment the nonce again and retry.

Also: this happened when there was an order open, which got left hanging.
When gekko started, it interpreted this as which obviously is weirdass, and makes things like this happen:
A "cancel / ignore open orders on start" line in the config and a tweak to the startup maths would help such confusion.

Edit: Once the order was cancelled by hand and gekko restarted, it traded it as usual.

Edit again: having restarted gekko a few times, it's clear that a "get trading sim start balance from real balance" option would help lots.