Quote from InTheZone:
When is a swing point significant, in your opinion?
Thanks.
-- ITZ
What a big question.
Ultimately when a number of important factors converge to give extra weight to the reversal.
Look left and compare S&R, velocity matches, swing amplitudes, PA quality, volume, percentage moves, swing counts, multiple time frame context, energy, momentum, time, structure, etc.
Gann used time and price in swing charts instead of only price to construct the swing which is an interesting concept to develop. He observed that a market would usually make 5 - 7 swings before a strong reversal but if there was an extension and 13 or more swings took place he would look for a very powerful over sized move.
Elliot had his infamous wave count and super cycles employing pattern, time and ratio.
There are many methods but I think the best is to find your own combinations and that will mean the significance depends on the values you can discover in different set ups.