If bar low[1] < bar low[2] AND volume[1] > volume[2] AND bar open[1] >= bar close[1] AND bar open[2] >= bar close[2] and bar low >= bar low[1] and bar close[1] < 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[1] this permits a BOB to include a tweezer bottom. I think that is a very powerful combination.
If bar low = bar low[1] 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.