30-10-3 MAX,min dynamics

Supported timeframes: The script works only on timeframes of 1 minute or lower (including second-based timeframes).
Displayed levels: The highs and lows of the last closed candle are plotted for the 30-minute, 10-minute, and 3-minute timeframes.
Updates: The levels update only when a candle closes in the respective timeframe (e.g., every 30 minutes for the 30m levels).
Visualization: Dashed lines for highs and lows (blue for 30m, green for 10m, red for 3m).
Labels indicating "Max 30m", "Min 30m", etc., positioned above the highs and below the lows.