When are altcoins going to go up again?
when they really bottom out.
right now most altcoins are still in big bubbles despite their prices dropping (seemingly) hard. these need to really burst and the price needs to go down to the normal price levels which is in balance with their real demand.
by then you can expect "recovery" and until then you can only expect "dead cat bounce".
Bitcoin goes up. Shouldn't that help them recover?
no, if anything that will push them further down. because when bitcoin rises the traders may even leave the altcoin market to buy more bitcoin before it is too late.