Yea I dont like MT4 but seems the main tool that is used especially with demo accounts
So I had a starting balace of 5000 I out in a short with volume at 1 I thought that was one btc so leverage around 6x
was I buying 100,000 btc

Yeah, You will definitely get busted instantly with that balance and lot size. You're lucky that it's still in the demo but I do commit that kind of mistake when I'm new on MT4. I really don't like the UI/UX of their platform and decided to use a much simpler platform for forex trading. I'm not recommending this app but I'm currently using XM app because it's simple and has a better UI. It is MT4 and MT5 compatible but it requires KYC since it's fiat platform.