Great tutorial and some very sound advice. This is a great long term strategy and helps keep you out of trouble. I was taught to sell 10% at a time so you'll incrementally sell on the way up and on the way back down to catch some of the top, but that's easier said than done.
Being able to identify bottoms to add to your positions is maybe one of the hardest and most important skills to attain in investing and comes with experience and a deep understanding or your asset & the market.
Great job man and this is a must watch for all new investors. Re-Steemed.