I use Heikin Ashi a lot and also for scalping. In my own opinion we really can't say when price will continue or will range. This is the same with normal candlesticks, Heikin Ashi, Bar or Line Chart that we can't know what the future movement will be and all is just speculation. Analysis or calculation does help but even if we made hundreds of calculation that Price will go where it wants to go. Since technical gets it's data from hindsight we can just guesstimate. For me I look for small patterns, S/R on recent peaks, consolidation, signs of retracements, angles, breakouts and micro breakouts, etc. and just try my best. All goes down to your charting skills.
About news of fundamentals, I love trading the medium and high priority news but I don't follow the news. I can say that news can very much affect small TF and not much on longer TF. You'll often see this when price spikes after the news. Very often price will slow down before the news and spike after the release. This doesn't give much affect on longer TF say 1 day, 1 week, 1 month, et. Meaning that the news can spike and send price to spike down but if the general daily or weekly trend is up, more often price will go up again. If you are a scalper you will definitely see this. For big news like war, famine, major earthquakes, sunami, major economic crashes, drastic change in fuel prices, etc. do affect longer TF but for scalping, high and medium news release can send price spiking and can be dangerous.
Anyway, this is just my opinion.