To create a PineScript script that is sensitive to Bollinger Bands and enters positions when the price touches the upper or lower bands, we'll use TradingView's PineScript language. The script will:

1. Calculate Bollinger Bands.
2. Detect when the price touches the upper or lower band.
3. Generate buy/sell signals based on these touch events.

Here's the artifact containing the PineScript code:

Explanation:

1. Inputs:

   • length: Length of the moving average used in Bollinger Bands (default is 20).
   • mult: Standard deviation multiplier (default is 2.0).

2. Bollinger Bands Calculation:

   • mid: Simple Moving Average (SMA) of the closing price.
   • dev: Standard deviation multiplied by the user-defined multiplier.
   • upper and lower: Upper and lower bands calculated as mid ± dev.

3. Price Touch Detection:

   • ta.crossover(close, upper): Detects when the price crosses above the upper band.
   • ta.crossunder(close, lower): Detects when the price crosses below the lower band.

4. Strategy Entries:

   • When the price touches the upper band, a long position is entered.
   • When the price touches the lower band, a short position is entered.

5. Optional Exit Logic:

   • Positions are closed after 10 bars (you can adjust this or remove it based on your needs).

6. Visualization:

   • Green triangles indicate buy signals (price touching the upper band).
   • Red triangles indicate sell signals (price touching the lower band).

How to Use:

1. Copy the PineScript code from the artifact.
2. Paste it into a new Pine Script editor on TradingView.
3. Customize the inputs (length and mult) as needed.
4. Run the strategy on your desired chart to see the signals and backtest the performance.

This script is sensitive to price movements near the Bollinger Bands and generates entries when the price touches the upper or lower bands. Adjust the parameters and exit logic as per your trading strategy.