I've used both but prefer without pre/post-market info since Pre-market/After-hours tends to be extremely volatile. By that the price per share can easily fluctuate from let's say $19 to $26 without any action in between. That can severly affect a chart's setup.
But then again, it all depends on how you tailered your chart's setup. If you tweaked the setup to accomdate those extreme fluctuations on the price action, then you should be fine.
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