So far, I've learned that it is not ideal to use just one analytical tool, it's going to end in disaster doing that, even while trading using the timeframe, it's advices to trade multi-timeframe in order to be able to see the market from a bigger perspective.

In my techniques, I have multiple things (techniques) to carry out before entering a trade, this is otherwise called conservative type of entry. I also have used trendline in conjunction with RSI before and it worked perfectly well for me. Using multiple analytical tools help to reconfirm entries and reduces risk in trading, it's worth employing as a trading skill.