Some traders are closed minded and only think Price Action the only way to trade, some traders never learned how to use Bollinger Bands, but regardless, what works first is being able to know charting better than back of your hand first, then after you know charting well, then you can add moving averages and Bollinger Bands to make trading just a tad easier. I use both in my trading, but I did hand charting for 20 plus years even after I bought home computers. And when you use indicators, study what moves the indicators, so when price moves you can expect the indicator to do XYZ, and when they don't do as they should, you have divergence of Price and indicator and this can be very important. Trading is understand Price first and everything else second.
Questions that you ask come from a book by John Carter, I don't think he even now trades futures as he is hawking options book? See if you can get it through a library as it is expensive book or university, or rent it through amazon. Some of it I couldn't get to work for me called the Squeeze, gave me too many losing occurrences, it a coin toss of when price gets tight range, it is going to expand one direction or the other. Unless you can read Price and what it has the Probabilities of what it might do, don't look at Bollingers at a Bulge, from a budge price can lead onto long channel one direction or other.
In upper right, use the "Search" and start reading, or go down to Educational Resources of this forum. But like anything, if you don't become an expert in chart reading, indicators will have no real good way of making your life better in trading.
What newer traders don't realize that charting will do for you are non signal trades, charting can scream when not to take trades in direction of trend, so just taking Bollinger band trades cause it is a signal can become a loss they could have avoided. Taking a solid 2-3 years of heavy study of price would put you ahead of the many of the 95% who might not be here three years from now, but they will be replaced who think trading is exciting and fun.
People tend to do what is easy first and seldom correct thing to do, as being correct take long time to do well and right.
