开始

标准差(StdDev)

Linear Regression Trend ChannelThis is my first public release of indicator code and my PSv4.0 version of "Linear Regression Channel", as it is more commonly known. It replicates TV's built-in "Linear Regression" without the distraction of heavy red/blue fill bleeding into other indicators. We can't fill() line.new() at this time in Pine Script anyways. I entitled it Linear Regression Trend Channel, simply because it seems more accurate as a proper description. I nicely packaged this to the size of an ordinary napkin within 20 lines of compact code, simplifying the math to the most efficient script I could devise that fits in your pocket. This is commonly what my dense intricate code looks like behind the veil, and if you are wondering why there is no notes, that's because the notation is in the variable naming. I excluded Pearson correlation because it doesn't seem very useful to me, and it would comprise of additional lines of code I would rather avoid in this public release. Pearson correlation is included in my invite-only advanced version of "Enhanced Linear Regression Trend Channel", where I have taken Linear Regression Channeling to another level of fully featured novel attainability using this original source code. Features List Includes: "Period" adjustment "Deviation(s)" adjustment "Extend Method" option to extend or not extend the upper, medial, and lower channeling Showcased in the chart below is my free to use "Enhanced Schaff Trend Cycle Indicator", having a common appeal to TV users frequently. If you do have any questions or comments regarding this indicator, I will consider your inquiries, thoughts, and ideas presented below in the comments section, when time provides it. As always, "Like" it if you simply just like it with a proper thumbs up, and also return to my scripts list occasionally for additional postings. Have a profitable future everyone!
Pine Script™指标
由ImmortalFreedom提供
20
Standard Deviation - Sum Of The Squares Minus Square Of The SumsIntroduction The standard deviation measure the dispersion of a data set, in short this metric will tell you if your data is on average closer or farther away from the mean. Its one of the most important tools in statistics and living without it is pretty much impossible, without it you can forget about Bollinger-bands, CCI, and even the LSMA (ouch this hurt) . Now i don't want to extend myself about the standard deviation since that would require a huge post but i want to show you how to calculate the standard deviation from the stdev pinescript function. Sum Of The Squares Minus Square Of The Sums Any metric calculated from a moving average can be classified as "running", this mean that the metric constantly update itself and is not constant, this is why it is better to say "running standard deviation" but its okay. If we use the standard calculation for the standard deviation which would be sqrt(sma(pow(close - sma,2))) we might get something totally different from the stdev function : In white the pine stdev function and in red the standard calculation of both period 4, its clear that both are not the same, one might try to use the Bessel's correction but that won't do either, this is because most technical analysis tools will calculate the square root of the "Sum Of The Squares Minus Square Of The Sums" method to estimate the standard deviation Another way is to use : a = sqrt(sma(pow(close,2),length) - pow(sma(close,length),2)) By returning the difference we might still see some errors : Nothing relevant of course. Conclusion Some of you might already be aware of this but a reminder is always good since it can be confusing to make what can be considered the good standard deviation formula and then have something totally different from the pine function, i hope this post will be useful and that you learned something from it. Thanks for reading :)
Pine Script™指标
由alexgrover提供
19
Realized VolatilityRealized / Historical Volatility Calculates historical, i.e. realized volatility of any underlying. If frequency is not the daily, but for example 6h, 30min, weeks or months, it scales the initial setting to be suitable for the different time frame. Examples with default settings (30 day volatility, 365 days per year): A) Frequency = Daily: Returns 30 day historical volatility, under the assumption that there are 365 trading days in a year. B) Frequency = 6h: Still returns 30 day historical volatility, under the assumption that there are 365 trading days in a year. However, since 6h granularity fits 4 times in 24 hours, it rescales the look back period to rather 30*4 = 120 units to still reflect 30 day historical volatility.
Pine Script™指标
由JSterz提供
Self-Adjusting RSI +Here is an open source (no request needed!) version of the Self-Adjusting RSI by David Sepiashvili. Published in Stocks & Commodities V. 24:2 (February, 2006): The Self-Adjusting RSI David Sepiashvili's article, "The Self-Adjusting RSI," presents a technique to adjust the traditional RSI overbought and oversold thresholds so as to ensure that 70-80% of RSI values lie between the two thresholds. Sepiashvili presents two algorithms for adjusting the thresholds. One is based on standard deviation, the other on a simple moving average of the RSI. This script allows you to choose between plotting the Self-Adjusting bands or the traditional bands. You can also plot a smoothed RSI (SMA or EMA) and change the theme color for dark or light charts. If you find this code useful, please pass it forward by sharing open source! Thank you to all of the open source heroes out there! "If I have seen a little further it is by standing on the shoulders of Giants."
Pine Script™指标
由AltJams提供
10
Deviation Magnet - JDThis indicator shows price in relation to the standard deviations in a normalised way. It can be seen as a kind of Bollinger Bands, where the bands stay the same size apart and price amplitude is modified between them, or as a 'normalised' version of my BBC indicator. Contrary to the popular use where price is seen as BOUNCING AGAINST the different deviations (or upper and lower BBands), I tend to find that price likes to STICK to those deviations once it hits them (with a high or a low wick) and "rides them" for a while. I call this "THE MAGNET EFFECT" of the standard deviations. The indicator highlights those "MAGNET MOVES". For most assets I like to use 50 period deviations better than the standard 20 period because it shows the bigger trends better but of course this can be modified to your liking! JD. #NotTradingAdvice #DYOR I build these indicators for myself and provide them open source, to use for free to use and improve upon, as I believe the best way to learn is toghether.
Pine Script™指标
由Duyck提供
18
Bollinger Bands MTF [LonesomeTheBlue]With this script you can follow Bollinger Bands for current and higher time frame together. Higher time frame is calculated by script. if current period 1m => higher period=5m 3m => higher period=5m 5m => higher period=15m 15m => higher period=1h 30m => higher period=1h 45m => higher period=1h 1h => higher period=4h 2h => higher period=4h 3h => higher period=4h 4h => higher period=1day 1day => higher period=1week
Pine Script™指标
由LonesomeTheBlue提供
2
Linear Regression Channel [jwammo12]This is a non-repaint version of the built-in linear regression indicator in pine. It creates moving bands where the current bar matches the built-in Linear Regression indicator exactly (see screenshot). The key to replicating the built-in function is calculating the std deviation across the length of bars away from the current Linear Regression line, as opposed to the linear regression line that would have been calculated at the historic bar.
Pine Script™指标
由jwammo12提供
9
[RESEARCH] Mean Absolute DeviationHello traders and developers! I was wondering how built-in "dev" function in Pine is calculated so I made a little research. I examined 7 samples: 0) "dev" function itself 1) "dev" according to its description: series - sma(series) 2) Mean Absolute Deviation 3) ratio of the absolute difference from 1) divided by period 4) ratio of the difference from 1) divided by period 5) Median Absolute Deviation 6) tricky for-loop to calculate Mean Absolute Deviation The results of the null and sixth samples are identical. So, TV built-in "dev" function represents Mean Absolute Deviation and it's description is incorrect. Where it is used? For example: Commodity Channel Index. You can check its original formula and if you used simple standard deviation instead of MAD in your CCIs - well guys, you were wrong. Good luck!
Pine Script™指标
由everget提供
10
Objective Analysis of Spread (VSA)Note: Pardon for a busy chart. It really is irrelevant for this indicator. Just look at the bottom part of the chart for the indicator (SpAn). This script is meant to add objectivity to the estimation of spread in VSA. This is best used with a similar volume indicator that measures volume in the same fashion, but a simple rule of "higher/lower than the previous 2 bars" for estimation of volume size can be used as well in conjunction with this indicator. A 30-period (adjustable) SMA difference between the high and the close is used to estimate average spread. This value is used to plot bands of 0.8 and lower (blue) standard deviation for narrow spread, 0.8-1.3 (yellow) for medium spread, 1,3-1.8 (green) for wide spread, 1.8-3 (red) for ultra-wide spread. Anything above 3 (no color) is plain crazy. =) How to use: A histogram of each bar spread is plotted as well. See where each histogram bar ends. For example, if it ends in the green area, this bar has a wide spread. Added indicator: An ATR (14-period, adjustable) is plotted as a black line for your reference. May be used for stops. Otherwise, it is not necessary for VSA. Feedback and suggestions for improvement are welcome.
Pine Script™指标
由HumbleDumbell提供
12
VWAP Stdev BandsCurrent price always obeys VWAP and is very useful for intraday traders. The Price will never go beyond the second deviation of VWAP at any point of time. The deviation bands are also very useful in predicting the volatility of the script. Breakout trades can be taken based on the previous day's VWAP and it's deviations. One can say that the stock has experienced breakout if current price crosses the fourth deviation of the previous day's VWAP or price bounces off that level, the price movement will be rapid if this occurs providing a good trading opportunity with low risk-reward ratio.
Pine Script™指标
由dbdecoy提供
1