Hi, 1st post here so please excuse if in the wrong place!
since this is one of the ways to choose coins for "trading" i'd say this is the correct board.
I'm looking at altcoins, in particular ones that show an uptrend in volume. My thoughts are that it could indicate possible nearterm pumps.
true, i have been using the increase in volume as one of the indicators for an upcoming rise. it may be an increased in volume without price rise showing an accumulation phase before the rise or it can be the increase in volume showing the first leg of the rise. in both cases it can be considered an early stage to join in.
Is there anywhere that has this kind of information or am I going to have to look over loads of charts?
well the only way is that plus using some sort of automation like using a bot or their API to get the history and then analyze it yourself.
usually these exchanges have some sort of table that sort these daily hot coins on top.
the coinmarketcap thing that @mjglqw suggested won't show you increase in volume it just shows THE volume of that day. you have no way of saying it is bigger or smaller or the same as before.