myles wilson walker - wd gann forecasting key

many books are presented as the ultimate key to Gann' secrets, but they turn out to be very disappointing.
surely there is always something new to learn, but it seems that authors demand a lot of money for promises they don't keep
I read the book profitable forecasting which contains, astrological market timing. But there i didn't find the proper scaling or any details about it. Not all the people use paid software. If i need to do it manually in mt4, then i need to know about proper scaling, planet degree to price conversion in different time frame.
For me instead of buying these books, its better to read Gann's original books. The true key is in there, just need to use brain. Gann left lots of clues.