While I think your head is in the right place i think you are being misled by coincidence right now. There are patterns to be found, but Bitcoin and any given alt-coin do not have any inverse correlation in terms of their price. Occasionally their are circumstances which cause people to exchange their BTC for an alt because of network congestion, price pumps and dumps, and other factors, but this will not always be the case.
I have seen both rise simultaneously, because they are both cryptocurrencies, yet they are different in whatever ways depending upon the alt-coin. This means that for any given reason that bitcoin may go up, the alt-coin may share this reason, it may exaggerate this reason, or this reason may be nullified. This works in reverses as well, Bitcoin may refuse to develop a solution, or fix a problem that an alt-coin addresses either temporarily or permanently and this will cause Bitcoin to fall while an alt-coin rises.
The criteria and scenarios are too varied to say something as simple as "When one goes up, the other goes down", plus even if this were the case you wouldn't be able to take advantage of this information because as one goes up the other is going down; you could not get a jump on the trend/correlation if they are truly tied to one another in this way.
You should look at them independently unless you believe that cryptocurrencies as a whole will benefit or detriment from whatever event, news or mass-adoption. Bitcoin develops independently from the rest of these alt-coins, is invested, exchanged, transacted, etc. independently from all of the others, so I'd say their biggest correlation is when something is temporarily driving users from one to another, transaction fess or the other things I haven't mentioned.
I'm no expert by any means, but I have quite a few years of trading experience, if you have more questions fire away; i'll be checking gin on this thread if you need me, or feel free to shoot me a PM; we can bounce ideas and try to find new patterns together. i'll tell you why i think you're right or wrong, and I very well could be right or wrong myself.
Hi bro, well. in past months we saw that all altcoins bleeding while BTC price goes up at its all high at unbelievable rate. And then, in recent past days BTC price got slide way ( no trend) Then Altcoins started to climbs up like a rocket. I observe this scenario, Thats Why I just started to think BTC and Altcoins have inverse connection. But as you pointed out there is no such a reliable connection between 2.
Sure, I will contact you via pm. It is great to have a communication with you.