Hi Mate All good, don't stress like you I used to ask alot of...

Hi Mate
All good, don't stress like you I used to ask alot of questions to the charters and I think its good to help.

So much also depends on how you trade... If I was day trading STX I would have sold at the cross over highlighted by the red circle in the chart (9th Jan). Once it crosses the Bollie Centre (Mean) it gives me the second sell marker (12th Jan) if day trading - note this is the daily chart.

Bollinger band = BB they are the blue lines on both side of the SP candles.
In the case of STX if you look you can see when the candle goes over the BB the SP pulls back between the BB in early Oct.
As below the BB goes over and then pulls back to the mean, we then have a cross over sell marker (Red dot) as well before the SP continued decrease.

Right now on STX we have the situation of the Candle way outside the bottom BB. Also there is a GAP in the chart... a massive one... this helps explain Gaps:
Gap Trading: How to Play the Gap (investopedia.com)



There are other factors that come into play and different people use charts in other ways as well, i.e. patterns etc. This is just my personal use of the charts.

As for the low, that will be support lines in the chart. 30c to me looked like a solid place to start buying again.