I sold 10% of my holdings today not sure if it was the right...

I sold 10% of my holdings today not sure if it was the right move wish I knew a little bit more about charts Although a profit is a profit. I do know we are in a upswing just don't want to get caught out like last time when it got into the 70s and reversed all the way back to the 30s. Just figuring out where my next sell point is ? I know a lot of people buy on the way up I sort of do the opposite I sell on the way up and buy on the way down.