First am not a pro trader, but my trading techniques have proven fundamentals. I recycled around Bitcoin and some handful of good altcoins; I trade with a hand full of funds since altcoins and the bitcoin market move in the opposite direction; I fill my bags with altcoins when the alt markets are down against Bitcoin and sell them when the market is on the rise to buy bitcoin which will be on a downtrend at that moment.
This technique has worked for me over the years.
On a serious note your trading strategy Is really good and simple that even a a newbie can also use same strategy easily and also be successful as well, your strategy follows the law of trading which is buy low and sell high. Buying low and selling high is the easiest way to make profit with less risk applied, but at same time this trade can play with your emotions making you not to take the right decision at the right time, most times you can enter a trade at its deep and it keeps going deep, placing a trade isn't the main focus but the action you take after after your order is picked is what makes your trade profitable.