You have to tell us your Country so we can help you
Edit: Nevermind I saw you are from UK
Look up these documents https://www.gov.uk/government/publications/incorporation-and-names
If your business names contains one of these words you have to get an permission to use it
Get yourself an Laptop Fan, you place your laptop on that fan and it should bring your Temps down.
I know it's not the best solution but you could buy an PC.
Please download HWMonitor (https://www.cpuid.com/softwares/hwmonitor.html)
run your Trading Tools and wait for 5 minutes.
Start HWMonitor and post an screenshot please.
I am 70% sure it is thermal issues
Could you tell me your exact model?
Other possible issues could be Thermal Throttling.
There is a Tool called HWInfo, you can check your Laptops internal Temperatures.