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MyTT_plus.py
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MyTT_plus.py
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# MyTT 麦语言-通达信-同花顺指标实现 https://github.com/mpquant/MyTT
# 高级函数版本,本文件函数计算结果经过验证完全正确,可以正常使用,但代码比较复杂,做为进阶使用。
# MyTT团队对每个函数精益求精,力争效率速度,代码优雅的完美统一,如果您有更好的实现方案,请不吝赐教!
# 感谢以下团队成员的努力和贡献: 火焰,jqz1226, stanene, bcq
#------------------------工具函数---------------------------------------------
def HHV(S, N): #HHV,支持N为序列版本
# type: (np.ndarray, Optional[int,float, np.ndarray]) -> np.ndarray
"""
HHV(C, 5) # 最近5天收盘最高价
"""
if isinstance(N, (int, float)):
return pd.Series(S).rolling(N).max().values
else:
res = np.repeat(np.nan, len(S))
for i in range(len(S)):
if (not np.isnan(N[i])) and N[i] <= i + 1:
res[i] = S[i + 1 - N[i]:i + 1].max()
return res
def LLV(S, N): #LLV,支持N为序列版本
# type: (np.ndarray, Optional[int,float, np.ndarray]) -> np.ndarray
"""
LLV(C, 5) # 最近5天收盘最低价
"""
if isinstance(N, (int, float)):
return pd.Series(S).rolling(N).min().values
else:
res = np.repeat(np.nan, len(S))
for i in range(len(S)):
if (not np.isnan(N[i])) and N[i] <= i + 1:
res[i] = S[i + 1 - N[i]:i + 1].min()
return res
def DSMA(X, N): # 偏差自适应移动平均线 type: (np.ndarray, int) -> np.ndarray
"""
Deviation Scaled Moving Average (DSMA) Python by: jqz1226, 2021-12-27
Referred function from myTT: SUM, DMA
"""
a1 = math.exp(- 1.414 * math.pi * 2 / N)
b1 = 2 * a1 * math.cos(1.414 * math.pi * 2 / N)
c2 = b1
c3 = -a1 * a1
c1 = 1 - c2 - c3
Zeros = np.pad(X[2:] - X[:-2],(2,0),'constant')
Filt = np.zeros(len(X))
for i in range(len(X)):
Filt[i] = c1 * (Zeros[i] + Zeros[i-1]) / 2 + c2 * Filt[i-1] + c3 * Filt[i-2]
RMS = np.sqrt(SUM(np.square(Filt), N) / N)
ScaledFilt = Filt / RMS
alpha1 = np.abs(ScaledFilt) * 5 / N
return DMA(X, alpha1)
def SUMBARSFAST(X, A):
# type: (np.ndarray, Optional[np.ndarray, float, int]) -> np.ndarray
"""
通达信SumBars函数的Python实现 by jqz1226
SumBars函数将X向前累加,直到大于等于A, 返回这个区间的周期数。例如SUMBARS(VOL, CAPITAL),求完全换手的周期数。
:param X: 数组。被累计的源数据。 源数组中不能有小于0的元素。
:param A: 数组(一组)或者浮点数(一个)或者整数(一个),累加截止的界限数
:return: 数组。各K线分别对应的周期数
"""
if any(X<=0): raise ValueError('数组X的每个元素都必须大于0!')
X = np.flipud(X) # 倒转
length = len(X)
if isinstance(A * 1.0, float): A = np.repeat(A, length) # 是单值则转化为数组
A = np.flipud(A) # 倒转
sumbars = np.zeros(length) # 初始化sumbars为0
Sigma = np.insert(np.cumsum(X), 0, 0.0) # 在累加值前面插入一个0.0(元素变多1个,便于引用)
for i in range(length):
k = np.searchsorted(Sigma[i + 1:], A[i] + Sigma[i])
if k < length - i: # 找到
sumbars[length - i - 1] = k + 1
return sumbars.astype(int)
#------------------------指标函数---------------------------------------------
def SAR(HIGH, LOW, N=10, S=2, M=20):
"""
求抛物转向。 例如SAR(10,2,20)表示计算10日抛物转向,步长为2%,步长极限为20%
Created by: jqz1226, 2021-11-24首次发表于聚宽(www.joinquant.com)
:param HIGH: high序列
:param LOW: low序列
:param N: 计算周期
:param S: 步长
:param M: 步长极限
:return: 抛物转向
"""
f_step = S / 100; f_max = M / 100; af = 0.0
is_long = HIGH[N - 1] > HIGH[N - 2]
b_first = True
length = len(HIGH)
s_hhv = REF(HHV(HIGH, N), 1) # type: np.ndarray
s_llv = REF(LLV(LOW, N), 1) # type: np.ndarray
sar_x = np.repeat(np.nan, length) # type: np.ndarray
for i in range(N, length):
if b_first: # 第一步
af = f_step
sar_x[i] = s_llv[i] if is_long else s_hhv[i]
b_first = False
else: # 继续多 或者 空
ep = s_hhv[i] if is_long else s_llv[i] # 极值
if (is_long and HIGH[i] > ep) or ((not is_long) and LOW[i] < ep): # 顺势:多创新高 或者 空创新低
af = min(af + f_step, f_max)
#
sar_x[i] = sar_x[i - 1] + af * (ep - sar_x[i - 1])
if (is_long and LOW[i] < sar_x[i]) or ((not is_long) and HIGH[i] > sar_x[i]): # 反空 或者 反多
is_long = not is_long
b_first = True
return sar_x
def TDX_SAR(High, Low, iAFStep=2, iAFLimit=20): # type: (np.ndarray, np.ndarray, int, int) -> np.ndarray
""" 通达信SAR算法,和通达信SAR对比完全一致 by: jqz1226, 2021-12-18
:param High: 最高价序列
:param Low: 最低价序列
:param iAFStep: AF步长
:param iAFLimit: AF极限值
:return: SAR序列
"""
af_step = iAFStep / 100; af_limit = iAFLimit / 100
SarX = np.zeros(len(High)) # 初始化返回数组
# 第一个bar
bull = True
af = af_step
ep = High[0]
SarX[0] = Low[0]
# 第2个bar及其以后
for i in range(1, len(High)):
# 1.更新:hv, lv, af, ep
if bull: # 多
if High[i] > ep: # 创新高
ep = High[i]
af = min(af + af_step, af_limit)
else: # 空
if Low[i] < ep: # 创新低
ep = Low[i]
af = min(af + af_step, af_limit)
# 2.计算SarX
SarX[i] = SarX[i - 1] + af * (ep - SarX[i - 1])
# 3.修正SarX
if bull:
SarX[i] = max(SarX[i - 1], min(SarX[i], Low[i], Low[i - 1]))
else:
SarX[i] = min(SarX[i - 1], max(SarX[i], High[i], High[i - 1]))
# 4. 判断是否:向下跌破,向上突破
if bull: # 多
if Low[i] < SarX[i]: # 向下跌破,转空
bull = False
tmp_SarX = ep # 上阶段的最高点
ep = Low[i]
af = af_step
if High[i - 1] == tmp_SarX: # 紧邻即最高点
SarX[i] = tmp_SarX
else:
SarX[i] = tmp_SarX + af * (ep - tmp_SarX)
else: # 空
if High[i] > SarX[i]: # 向上突破, 转多
bull = True
ep = High[i]
af = af_step
SarX[i] = min(Low[i], Low[i - 1])
# end for
return SarX