It takes most traders a long time to learn all the lessons from their mistakes. They say there are two sides to everything. However, there's only one side to the stock market and it's not the bull side or the bear side. The only side that matters is the right side.Watch $SPY.Beyond Meat $BYND promises a billion dollar addressable market in a few quarters. Traders are buying the story. Avoid after you try the product and see for yourself the extra cost is not worth it.Nutanix $NTNX tanked last week. The hyper convergence turns out to be buzz words with no revenue momentum.Nvidia $NVDA failed to rally with $AMD. AMD rallied on the Xbox refresh news (2020) only to lose to profit-takers. The stock fell by over 6% on the week. Trade both.Are you buying $TEVA or Allergan $AGN after the big drop? Allergan is down 9% on NO news. The botox supplier is struggling to grow coolsculpting. Tough times? Hardly. Poor execution from the CEO and the management team.Good quality biotech stocks are down in sympathy. Watch $REGN Regeneron falling below $300 this week. $NVSBuy the dip in $AVGO. Or wait for a trade deal to lead to a resumption in chip orders for Broadcom for 2H/2019.$QRVO, $SWKS, and $MU all trade at a discount in anticipation of extended trade wars.Why is $STX Seagate worth more than $WDC Western Digital?