ALGN gapped up strongly on Earnings beat during its last earning on 1st Feb23. It then subsequently corrected and partially closed the gap, finding support eventually @ 297 the previous neckline region (now tuned support) and also right at the 38.2% fib retracement of the big recent upswing AB.
Since it's last Earnings, the stock had been wedging in a range but what is clear is that the bogger trend is likley still on the upside as there was a Golden Cross that occured on 14 Feb (nearly 2 month ago) with both the 50 and 200 day MA sloping up now (mild slope for the 200 day MA as it will take a longer time to refect the new trend). Plus the fact that the stock has been holding above it's basing formation neckline.
Any dip back towards the neckline region (297-303) could be an opportunity to long. I suspect the coming earnings expected on 26th April could provide the catalyst to propel it above this trianglle pattern. However, trade earnings at your own risk.
If trade works out, I will be watching to scale out (partially) from 425 - 455, and manage the rest of the position with trailing stops.
Disclaimer: Just my 2 cents and not a trade advice. Kindly do your own due diligence and trade according to your own risk tolerance and don't forget that money management is important! Take care and Good Luck!