cash (btc) is always zero about pgportfolio

[AhmMontasser]

among the possible coin choices there is a reversed_USDT coin mapping to BTC_USDT pair, which i believe is exactly what you say.

[dexhunter]

In the new portfolio vector (raw omega) the cash (btc) is always zero.

@ziofil Hi! Since the last activation is softmax, the voting will be adjusted according to the network. It all depends on the network. If the network thinks BTC is valuable it will just lower other assets' voting.

[dexhunter]

An example looks like this:

a = [0,1,2]
softmax(a) -> array([ 0.09003057, 0.24472847, 0.66524096])

b = [0,0.1,0.2]
softmax(b) -> array([ 0.30060961, 0.33222499, 0.3671654 ])

[ziofil]

@dexhunter Oohhh.. I had missed that 😅
Thank you.

[dexhunter]

@ziofil No problem, I met this problem before. I think we will update the code using Variable later since I found using Variable seems to give better result. But will check with @ZhengyaoJiang first