As long as your charts are standardized to the parameters chosen (whatever they are) your readings (which are always open to individual interpretation) should be fine.

i used to wonder like you are but, pragmatically, it does not make any difference in practice.

Where you can study, is to compare various bars charts with different parameters. That is, maybe one chart with the old hours of trade against a 24 hour chart. It is possible one will give you clues before the other....the data used being somewhat different. One may show a gap in daily price while the other may not, etc..one may be an inside day, the other not....on and on.