当 Pine Script 中的成交量条低于成交量 SMA 时如何为最低成交量蜡烛着色

Question

Im trying to code barcolor() function to mark lowest volume candle from those who below the volume(SMA,5), im tried Matrix, built_in functions eg. ta.lowest(), arrays (actually almost near my target but something wrong due to some bars marked wrongly or ignored by code or in some instances marked correctly) and so many staff, only im able to do is color all candles that corresponds all volume bars below volume(SMA,5) thats actually simple to do, below part of code with arrays and also im attaching screenshot of the result.

//@version=5
cond = ma > vol
var float min_volume = na
length = ta.barssince(cond) 

Vol_array = array.new_float(500, 0)

for i = 0 to 499
    if cond
        min_volume := vol < vol[i] ? vol : na
        for j = 0 to length
            array.fill(Vol_array, min_volume[j])
min_array_vol = array.min(Vol_array)

//barcolor(cond ? color.rgb(216, 8, 119) : na)
barcolor(min_array_vol == vol ? color.blue : na)

So the result should be: lowest volume bar below the series of volumes under SMA should be accounted and marked

Answer 1

Now that I understand what you are attempting to do, then this is the easiest way to determine the minimum volume in the segment where volume is less than the SMA(5) of the volume.

the segment volume is now set and the bar_index (not the offset) is also now set. How you use that data is up to you.

var float running_min_vol = 0.0
var int running_min_vol_idx = 0
var float min_vol_segment= 0.0
var int min_vol_segment_idx =0
sma_v = ta.sma(volume,5)

if ta.crossunder(volume,sma_v)
    min_vol := volume
    min_vol_idx: bar_index

min_vol := math.min(min_vol,volume)

if nz(ta.change(min_vol))<0
    min_vol_idx := bar_index

if ta.crossover(volume,sma_v)
    min_vol_segment:= min_vol
    min_vol_segment_idx := min_vol_idx