In a former life I was a floor trader - fast forward decades - and now I scalp Crude Oil futures in front of the screen for a few ticks all day. Sometimes I trade ER2 if trading there is hectic.
See my thread:Some Observations on Scalping Crude under Energy Futures.
Each market has a different personality and one should use tools that are suitable for the particular market and one's on personality.
For Crude Oil I use very sensitive constant volume bar charts with volatility bands and oscillators on different scales. My charts are constructed in such a way that they help me to detect price hesitation or exhaustion at the extremes of moves that last a few minutes or at support resistance and I fade the market.
With that setup as a background I focus on reading momentum rather then the order stacks, in fact I have that turned off, and I do not use candle charts because by the time I decipher it the market is somewhere else.
The key to success in scalping is not so much the tools (I could use Stochastic, RSI or CCI interchangeably as my oscillator)but some understanding of the dynamic nature of price movement and the particular market.
The indicators don't give me a signal but help me decide what condition the market is in. Because of the compressed time frame I can't possibly read all chart formations or relationships therefore, beside getting it done, I am more focused on "am I doing the right thing?".
For ER2 I have A/D line and Tick overlayed in addition to the CL chart described above. The best time to trade ER2 is the chaos right after the opening when the charts are not even updating fast enough.
BTW, I consider trading ER2 in an out quick during conditions like that scalping. If one sits on trades for minutes it is really very short term trading or daytrading but not scalping.
Regards,
GC