This case study demonstrates a series of scalping trades using Bollinger Bands on a short-term chart. The primary techniques illustrated are the Stop-and-Reverse (SAR) and entries based on Doji candlestick patterns. This is a fast-paced style of trading that requires active management from candle to candle.
The initial setup involved a long trade where the first two targets were successfully met. The third and final portion of the position was managed with a trailing stop-loss (TSL) set at the median Bollinger Band.

The trade reversed, and my trailing stop-loss at the median band was triggered. While the overall trade was profitable, the triggering of the stop-loss immediately presented a new opportunity.
In advanced Bollinger Band trading, a stop-loss can also be an entry signal for a trade in the opposite direction. This is known as a Stop-and-Reverse (SAR) setup. When my trailing stop-loss on the long position was hit, it signaled a reversal. I immediately initiated a short trade. This strategy allows a trader to profit from volatility by capturing moves in both directions.

The short trade progressed, but soon a Doji candlestick pattern formed. A Doji signals indecision in the market and warns that the current momentum may be fading. Acting on this signal, I exited the short trade with a small profit, just above the breakeven point.


A Doji itself signals indecision. The subsequent price action is what provides the trading signal. Here is the specific strategy I use for a Doji breakout:
With this setup, I initiated a trade at the median Bollinger Band with two lots, setting two potential exit targets:
The original stop-loss was placed at the low of the spike on the preceding candle.

The trade successfully hit the first target. I then trailed the stop-loss to the first target’s level to secure profit while aiming for the second target. The second target was also achieved.

Eventually, the trailing stop-loss on the long position was hit, triggering another SAR setup. I immediately entered a short position with the stop-loss set at the price action level where the reversal occurred.

This stop-loss was ultimately hit, and I was out of the trade.

The market then presented another Doji setup.

Here is the play-by-play for this sequence:

To further refine the stop-loss, I averaged three potential support levels (180.14, 179.86, etc.) to get a mean around 180. Recognizing that round numbers are psychological barriers, I adjusted the stop slightly to 180.05, just above the psychological level.

As the trade moved in my favor, I trailed the stop-loss aggressively, first to 180.35 (low of the candle)…

…and then to 180.45 (low of the candle at 11:23). I finally closed the position at 181.05.
This complex sequence of trades illustrates how scalping is not a single strategy but a dynamic process of reading and reacting to price action on a candle-by-candle basis. It combines several core Entropy concepts:







Effective scalping requires more than just one setup. It involves blending multiple techniques like price action, candlestick patterns (Dojis), and indicator-based rules (Bollinger Bands) to adapt quickly to changing market dynamics. The SAR technique is a powerful tool for staying on the right side of short-term volatility.