50Days EMA and 200 Days EMA

Sir,
Recieved your book. Its really worth.
But i have one query about EMA.
In you book you have mentioned the better /best time for buying share using 50days EMA and 200 days EMA.
So if share price is trading below 50 and 200 day EMA is the buy signal.

In you example of titan industries is indicating the same.
Sir please clarify it. i am little confused for the buy signal usign EMA.

IF share price is trading below 50 day ema and above 200 days ema is buy signal or trading below both i.e. 50 day ema and 200 day ema is buy signal.

Sir, i also want to opt your such technical analyst expertise. how it can be possible. if its is chargeable also let me know.
I also want to learn the same thing for day trading techniques using charts.