Hey David,
I am not sure if I get your question exactly, but if you are asking if using a desktop computer would cause issues in transactions, the answer is No.
The latency or speed of execution comes from the broker and not from us. The broker is the one standing between and the real market.
Once we are connected to the server of the broker, whenever there is an order the Broker is obliged to execute it immediately. And if there is some delay it is because of the broker, not because of us or where we have the platform, on Forex VPS, on a desktop or computer.