Why using VPS?
There is disadvantage using Expert Advisor (EA)
If the power of your pc is off or internet connection disconnected, your Expert Advisor won't trade.
So if you have floating position, you''ll pray for the power is on or internet connection back to normal,
Expert Advisor can't close position while power is off, except you code the Expert Advisor to use Target Profit and Stop Loss as they are recorded in broker server. Don't forget about Stop Loss hunting by broker if you use this.
So
depa use VPS to overcome unstability of internet connection.
VPS is cheaper than dedicated Server and make sure the VPS you choosed is for trading forex.
ps: pastikan EA tu jugak power!!!