如何使用 plotly 绘制枢轴点?
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【中文标题】如何使用 plotly 绘制枢轴点?【英文标题】:How to draw Pivot points using plotly? 【发布时间】:2021-01-26 00:47:25 【问题描述】:我正在使用 plotly 绘制一些带有 SMA 和 MACD 数据的图表。这很好用。
fig = make_subplots(vertical_spacing = 0, rows=3, cols=1, row_heights=[0.6, 0.2, 0.2])
fig.add_trace(go.Ohlc(x=data['timestamp'],
open=data['open'],
high=data['high'],
low=data['low'],
close=data['close']))
fig.add_trace(go.Scatter(x=data['timestamp'], y=data['sma'], line=dict(color='orange', width=1)), row=1, col=1)
fig.add_trace(go.Scatter(x=data['timestamp'], y = data['macd']), row=2, col=1)
fig.add_trace(go.Scatter(x=data['timestamp'], y = data['macds']*1.1), row=2, col=1)
fig.add_trace(go.Bar(x=data['timestamp'], y = data['volume']), row=3, col=1)
fig.update_layout(xaxis_rangeslider_visible=False,
xaxis=dict(zerolinecolor='black', showticklabels=False),
xaxis2=dict(showticklabels=False))
fig.update_xaxes(showline=True, linewidth=1, linecolor='black', mirror=False)
fig.show()
但现在我想添加枢轴:
last_day['Pivot'] = (last_day['High'] + last_day['Low'] + last_day['Close'])/3
last_day['R1'] = 2*last_day['Pivot'] - last_day['Low']
last_day['S1'] = 2*last_day['Pivot'] - last_day['High']
last_day['R2'] = last_day['Pivot'] + (last_day['High'] - last_day['Low'])
last_day['S2'] = last_day['Pivot'] - (last_day['High'] - last_day['Low'])
last_day['R3'] = last_day['Pivot'] + 2*(last_day['High'] - last_day['Low'])
last_day['S3'] = last_day['Pivot'] - 2*(last_day['High'] - last_day['Low'])
last_day 的输出如下所示:
Timestamp Open High Low Close Volume Pivot R1 S1 R2 S2 R3 S3
499 2020-10-11T14:45:00.000Z 0.000321 0.000321 0.000319 0.000319 886.17 0.00032 0.000321 0.000319 0.000322 0.000318 0.000323 0.000316
如何将这些数据(Pivot、S1、S2、S3、...)添加到我的图形中?我想要与这里的图片相媲美的东西:https://www.fxpivot-points.com/?page=4
我试过了:
fig.add_trace(go.Scatter(x=last_day['Timestamp'], y=last_day['Pivot'], line=dict(color='purple', width=1)), row=1, col=1)
但它只画了一个点,因为我只提供了一个时间戳。我怎样才能使它成为一条水平线?
【问题讨论】:
【参考方案1】:您特别要求仅绘制最后天的计算点,并在您拥有烛台图的完整时间段内显示它们。如果这实际上是您在这里的目标,那么下面的代码 sn-p 将使用fig.add_shapes()
和fig.add_annotations()
来分别显示水平线和枢轴点名称。
如果有什么不对的地方请告诉我,我们可以讨论进一步的调整。
剧情:
基于 Apple 示例数据的完整代码:
import plotly.graph_objects as go
import pandas as pd
from datetime import datetime
df = pd.read_csv('https://raw.githubusercontent.com/plotly/datasets/master/finance-charts-apple.csv').tail(5)
fig = go.Figure(data=[go.Candlestick(x=df['Date'],
open=df['AAPL.Open'],
high=df['AAPL.High'],
low=df['AAPL.Low'],
close=df['AAPL.Close'])])
last_day = df.iloc[-1].to_frame().T
last_day = last_day.rename(columns = lambda x: x.replace('AAPL.', ''))
not_pivots = list(last_day.columns)
last_day['Pivot'] = (last_day['High'] + last_day['Low'] + last_day['Close'])/3
last_day['R1'] = 2*last_day['Pivot'] - last_day['Low']
last_day['S1'] = 2*last_day['Pivot'] - last_day['High']
last_day['R2'] = last_day['Pivot'] + (last_day['High'] - last_day['Low'])
last_day['S2'] = last_day['Pivot'] - (last_day['High'] - last_day['Low'])
last_day['R3'] = last_day['Pivot'] + 2*(last_day['High'] - last_day['Low'])
last_day['S3'] = last_day['Pivot'] - 2*(last_day['High'] - last_day['Low'])
last_day
pivots = [n for n in last_day.columns if n not in not_pivots]
pcols = ['green', 'blue', 'blue', 'red', 'red', 'black', 'black']
for i, col in enumerate(pivots):
# horizontal lines
fig.add_shape(type="line",
x0=df['Date'].iloc[0],
y0=last_day[col].iloc[-1],
x1=df['Date'].iloc[-1],
y1=last_day[col].iloc[-1],
line=dict(
color=pcols[i],
width=1,
#dash="dashdot",
),)
# line annotations
fig.add_annotation(dict(font=dict(color=pcols[i],size=12),
x=df['Date'].iloc[0],
y=last_day[col].iloc[0],
showarrow=False,
text=col,
textangle=0,
xanchor='right',
xref="x",
yref="y"))
fig.show()
【讨论】:
非常感谢。我知道这些计算仅适用于最后一天,并且图表显示了多天! @DenCowboy 好的,酷!鉴于链接源中的图像,这对我来说似乎有点奇怪。但如果这就是你想要的,那么这就是你会得到的 =) 我现在正在使用多个 das,所以我可以检查多个 macd 交叉等,但最后我只会打印一天的图表 :)以上是关于如何使用 plotly 绘制枢轴点?的主要内容,如果未能解决你的问题,请参考以下文章