$Tesla(TSLA.US)$ my approach is to acquire a small percentage every time dip down to resistance level. It might sound like averaging down if it continues the down trend but the key is you are staging in not all in when it dip. you will sleep better when it turns around and knowing you are not missing the trend, even when it goes down more your porfolio is intact since you are staging in.
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$NIO Inc(NIO.US)$ looks like it is going to have a short uptrend squeeze, day trade anyone?