I have 3 mandatory criteria that a chart must display before I'll consider a trend-following trade, plus up to 9 optional criteria which are then used to prioritise the preferred targets. The mandatories are 20EMA must be above the 50 (for an uptrend), the 50EMA is sloping upwards, and the 50EMA is above the 200. The optionals are equally basic, e.g. number of consecutive weeks with a weekly close above the 50EMA etc. etc. Obviously, each trader would pick their own depending on how many trades they want per month, their risk tolerance for failed entries, etc.
Once I have a target I'll get in on any price rise after a price fall as long as my order isn't at a new high: any pattern that fits that bill will do: if its a really high-scoring trend I will just use a single day price fall and set a buy order at its high. entry patterns aren't key to success.