davidqqq

//version=5
indicator('CD', overlay=false, max_bars_back=500)

// 输入参数
S = input(12, title='Short EMA Period')
P = input(26, title='Long EMA Period')
M = input(9, title='Signal Line Period')

// 计算DIFF, DEA和MACD值
fastEMA = ta.ema(close, S)
slowEMA = ta.ema(close, P)
DIFF = fastEMA - slowEMA
DEA = ta.ema(DIFF, M)
MACD = (DIFF - DEA) * 2

// 计算N1和MM1
N1 = ta.barssince(ta.crossunder(MACD, 0))
MM1 = ta.barssince(ta.crossover(MACD, 0))

// 确保长度参数大于0
N1_safe = na(N1) ? 1 : math.max(N1 + 1, 1)
MM1_safe = na(MM1) ? 1 : math.max(MM1 + 1, 1)

// 计算CC和DIFL系列值
CC1 = ta.lowest(close, N1_safe)
CC2 = nz(CC1[MM1_safe], CC1)
CC3 = nz(CC2[MM1_safe], CC2)
DIFL1 = ta.lowest(DIFF, N1_safe)
DIFL2 = nz(DIFL1[MM1_safe], DIFL1)
DIFL3 = nz(DIFL2[MM1_safe], DIFL2)

// 计算CH和DIFH系列值
CH1 = ta.highest(close, MM1_safe)
CH2 = nz(CH1[N1_safe], CH1)
CH3 = nz(CH2[N1_safe], CH2)
DIFH1 = ta.highest(DIFF, MM1_safe)
DIFH2 = nz(DIFH1[N1_safe], DIFH1)
DIFH3 = nz(DIFH2[N1_safe], DIFH2)

// 判断买入条件
AAA = CC1 < CC2 and DIFL1 > DIFL2 and MACD[1] < 0 and DIFF < 0
BBB = CC1 < CC3 and DIFL1 < DIFL2 and DIFL1 > DIFL3 and MACD[1] < 0 and DIFF < 0
CCC = (AAA or BBB) and DIFF < 0
LLL = not CCC[1] and CCC
XXX = AAA[1] and DIFL1 <= DIFL2 and DIFF < DEA or BBB[1] and DIFL1 <= DIFL3 and DIFF < DEA
JJJ = CCC[1] and math.abs(DIFF[1]) >= math.abs(DIFF) * 1.01
BLBL = JJJ[1] and CCC and math.abs(DIFF[1]) * 1.01 <= math.abs(DIFF)
DXDX = not JJJ[1] and JJJ
DJGXX = (close < CC2 or close < CC1) and (JJJ[MM1_safe] or JJJ[MM1]) and not LLL[1] and math.sum(JJJ ? 1 : 0, 24) >= 1
DJXX = not(math.sum(DJGXX[1] ? 1 : 0, 2) >= 1) and DJGXX
DXX = (XXX or DJXX) and not CCC

// 判断卖出条件
ZJDBL = CH1 > CH2 and DIFH1 < DIFH2 and MACD[1] > 0 and DIFF > 0
GXDBL = CH1 > CH3 and DIFH1 > DIFH2 and DIFH1 < DIFH3 and MACD[1] > 0 and DIFF > 0
DBBL = (ZJDBL or GXDBL) and DIFF > 0
DBL = not DBBL[1] and DBBL and DIFF > DEA
DBLXS = ZJDBL[1] and DIFH1 >= DIFH2 and DIFF > DEA or GXDBL[1] and DIFH1 >= DIFH3 and DIFF > DEA
DBJG = DBBL[1] and DIFF[1] >= DIFF * 1.01
DBJGXC = not DBJG[1] and DBJG
DBJGBL = DBJG[1] and DBBL and DIFF[1] * 1.01 <= DIFF
ZZZZZ = (close > CH2 or close > CH1) and (DBJG[N1_safe] or DBJG[N1]) and not DBL[1] and math.sum(DBJG ? 1 : 0, 23) >= 1
YYYYY = not(math.sum(ZZZZZ[1] ? 1 : 0, 2) >= 1) and ZZZZZ
WWWWW = (DBLXS or YYYYY) and not DBBL

// plot买入和卖出信号
if DXDX
label.new(bar_index, low, text='抄底', style=label.style_label_up, color=color.red, textcolor=color.white, size=size.small)
if DBJGXC
label.new(bar_index, high, text='卖出', style=label.style_label_down, color=color.green, textcolor=color.white, size=size.small)