I used trend-based scalping. Today is actually a good day for scalping. Ken, I think you were trading the wrong stuff, e.g., UVXY.
Very simple. If you determine an uptrend try to find a good time to buy low and then sell high, vice versa for a downtrend. Grab a decent profit and out. Don’t stay in too long due to the volatility and unpredictability. For example, today QQQ was in a zigzag pattern. You can do this on the up swing and down swing. If you’re wrong get out quickly. It’s scalping anyway.
What chart? You can see the QQQ intraday chart yourself. I guess the key is you get the trend right. Another key is if you get it wrong get out quickly. Also, if it’s not real time call showing chart afterwards means nothing.
Scalping is very risk approach of trading because it is playing on the random probabilities. However if you see big timeframe chart, there are some of the reasonable trends and big price movements, so it is safe to swing trade. Playing many times in the market eventually makes traders overtrade and no one can overcome this challenge all the time. I prefer swing trading and large timeframes.
In a volatile market like nowadays it’s hard to predict any longer timeframe movements than intraday, so scalping is actually safer.
Market generally shows segments of what type of entries one should take. Higher highs and lows, 21sma sloping are trend signals. When 21 sma is flat, buy bottoms/sell highs, risk small and target other side to trade chop. This is not learning high degrees of Math to scalp, but one has to do much testing.