I have used Dynamic Gann Levels for about 15 years.
I find them a simple and practical approach to the use of Gann.
BUT they will not tell you when to enter a trade.
They will tell you when price and time are coming together and you should concentrate on the price movement around that time. Better still they tell me when to ignore a trade.
opportunity knocks softly.
Don Fisher invented them and you can become a member and get the system for under A$200. Once a member you receive daily emails on the DGL application for the main world markets and commodities. I don't trade all the markets that are covered but it gives me a great overview of the World scene and movement.
You will find information @ http://dgl.topcities.com
