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The correlation filter money management strategy analyzes each incoming order and measures its correlation with each opened position in your portfolio. If the correlation between the new order symbol and a portfolio symbol is higher than a specific threshold (definable and optimizable in money management inputs) then the order is rejected, otherwise we analyze the correlation with another existing symbol until not positions are left. This script allows you to create a group of well-diversified stocks.
I have tested this technique on some trading systems and overall the results are positive. For example, a strategy I have developed few months ago were generating an annual return of 35% and the percentage of winners was 52%. After adding the correlation test script, with a 40% threshold, to the list of money management scripts of my trading system, the annual returned increased to 52% and the percentage of winners also increased to 67%.
The correlation filter script uses the "ParseFormula" function to execute the vector-based "correl" function that takes two time-series (Close prices for instance) and a period. The implementation of this script could be optimized (improved execution speed and less memory usage) by creating a correlation function within the "OnNewPosition" event.
The period that is used to calculate the different correlations is 60. It is defined in line 13 in the OnNewPosition event. It can be updated and added as an optimizable variable using "SetNumericInput" and "GetVariable" function. For more information, look at how the "Max Correlation" variable was implemented.
Trading financial instruments, including foreign exchange on margin, carries a high level of risk and is not suitable for all investors. The high degree of leverage can work against you as well as for you. Before deciding to invest in financial instruments or foreign exchange you should carefully consider your investment objectives, level of experience, and risk appetite. The possibility exists that you could sustain a loss of some or all of your initial investment and therefore you should not invest money that you cannot afford to lose. You should be aware of all the risks associated with trading and seek advice from an independent financial advisor if you have any doubts.
