Based on last year/years bull run, what do you consider to be signals that indicates this kind of movement? Do you see these in nowadays' BTC/Altcoin markets?
There is not much of a point to try to look for signals, if you look for them you could find some weak bull signals and you may deduct that we are close to a bull market, but if you look for bear signals you will see that the market is full of them but that can only tell you how the market was in the past and not how it is going to be in the future.