If bar low < bar low AND volume > volume AND bar open >= bar close AND bar open >= bar close and bar low >= bar low and bar close < EMA(21) and bar close > bar open set color to Red
And here is Tweezer. You will note in the BOB code that the requirement for bar low is to be ">=" bar low this permits a BOB to include a tweezer bottom. I think that is a very powerful combination.
If bar low = bar low and bar close > bar open and bar open < ema(21) set color to $70106D
Note that "color $70106D" is just my preference - you can set the color any way you prefer.
Again the constraint to be below ema(21) is to ensure it is a bottom and not an intermediate condition.
Needless to say but say it I will - either of these near or on a pivot point just adds value to the indicator.