This was purely about updating the Asset list variables (spread etc.), not about downloading historic prices (.t6 files), but yes, I always update the Asset list successfully in small batches Still I wanted to report this since you guys were discussing something similar. It really all comes down to IG's API limit. I imagine it's hard for the Zorro Devs and for you to implement a queuing or connection throttle while retaining the guarantee to be able to modify orders/close trades at all times. So don't worry about this too much and enjoy your holidays!