Upside-Downside and Custom Standard Deviation

This function can be used to calculate Upside/Downside standard deviation or any other custom standard deviation.

As an example, let us say you want to calculate standard deviation of returns but just returns that occurred while a particular stock was trading below its long-term or 250-bar moving average. That particular standard deviation is very easy to calculate using this custom standard deviation function. You just have to type this:

a = StddevC(perf(close, 1), 200, close > open);
plot(a, "", colorRed);


Note that the function name is similar to the built-in standard deviation function. You just need to add "C" at the end of the function.
Also don't forget that you need to download the indicator first in order to use it. Just click on the "Download" link/button below.

Here is another quick example.
Calculate the difference between upside and downside standard deviation for the past 200 trading bars:

r = perf(close, 1);
up = StddevC(r, 200, r > 0);
dw = StddevC(r, 200, r < 0);
dif = up - dw;
plot(dif, "Difference between Upside and Downside standard deviation", colorBlue);

Technical Analysis

• Annual Return of a Security
• Directional Trend Index
• watchlist4
• ATR - Average True Range Drawing Tool
• Triple Period Indicator
• Bleu Stochastic
• Coppock - VLT Momentum Indicator
• Klinger Volume Oscillator
• Permanent Portfolio Timing Active Rebalance V0.1
• Support and resistance lines based on N-Minutes high/low of a trading session
• More trading objects...

Fundamental Analysis

• Company Revenues - US Stocks
• Consumer Credit Historical Data
• US Stocks: Exchange, Market, Sector, S&P 500, Optionable
• AAII Asset Allocation Survey: Stock Funds, Stocks, Bond Funds, Bonds and Cash
• Finviz Downloader
• Two Consecutive and Positive Earnings Surprises
• Abu Dhabi Securities News
• Ratio of Stocks Outperforming/Underperforming Their Industry
• Forex Trading Indicator - Better than expected Economic Calendar Events
• NYSE Margin Debt
• More trading objects...