Hi, thanks for your response. Upon looking into the Journal tab I searched further & discovered a thread in the Support Forum that led me to a solution to this particular issue. It was a simple setting that prevented the tester from placing orders. Within the Expert properties under the Testing tab the currency selected is by default in USD, but my account is a GBP account so it needed to be changed to GBP which appears to have enabled trades to be opened in the tester. I will see how I get on with the software now that this issue appears to be resolved.