When MT5 shows as Not Responding (a platform freeze), this typically is caused by either a lack of machine resources or when the client terminal is overloaded due to processing more than it is designed to handle.

This can be triggered for multiple reasons such as:

• Too many indicators or EA's causing the platform to become overloaded
• A high quantity of price updates, such as during volatile market times such as news releases. This will further exacerbate any issues caused by indicators and EA's.
• Running the client terminal on a machine without adequate resources to handle the processing and memory requirement

If no indicators or EAs are running on the platform, then it is more likely that it is a resource issue on the machine - which may be either due to other processes running on the machine consuming the available resources, or those resources being too low to handle the needs of MT4.