1. Create a website with price ticker of Bitcoin.
2. Manage some regular traffic.
3. Register a company with brand name that makes customer feel secure.
4. Find wealthy investor interested in Bitcoin.
5. Give him handsome share and prestigious post.
6. With money, hire or gather a team for website development.
7. Self-develop or buy trade engine algorithm depending on your caliber, money available or understanding of exchange.
8. Befriend some legal counsel or engage them for you.
9. Plan irrelevant AML/KYC policy and boast about it.
10. Launch it in beta version and create a hoopla about it with trademarks.
11. Approach VCs.
Now, you're proud founder and owner of exchange which does nothing more than ineffective price discover. Congratulations!
Hope, I gave you same valuable inputs. Trust me, I've seen exchange being established this way.
This post has been reported by 2 people for trolling. I will be marking both as Handled.
I will allow it as it does allow an insight as to how misleading mechanics can work a business...
OP failed to mention that there is a passion, understanding, defend ability and a long term sustenance factor involved.