I have done TA for BTC .D quite a number of times and this is why I give so much EMPHASIS on it.
The logic here is simple, BTC.D goes up means people are willing to swap or sell ALTS for BTC . and vice versa.
Have you heard of traders saying "Trade with the trend?", "Trend is your friend?" The concept here is the same with BTC .D but the message is different. It tells you when you should buy BTC and when you should buy ALTS. This is of course if we are in an uptrend. Follow my TAs on BTC and BTC .D to understand my bias.
My prediction for BTC .D remains the same as per my previous idea post more than a week ago. Refer here:
Long BTC if we expect pumps. Short ALTS if we expect dumps. KEEP THINGS SIMPLE and your trading will be consistent and profitable.