How do I use a recorded variable to generate signals?

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How do I use a recorded variable to generate signals?

edited

My problem here is the following:

My trading signal is based on historical values of a portfolio of futures. The weights of the portfolio are time-varying. I understand I can use the record function to record it on a daily basis for plotting purpose. But I am wondering if it is possible to access the history of this recorded variable, say, to calculate the moving average.

I am a total newbie here. The record function might not be suitable for this purpose at all. But can anyone help give me a direction on how to "save" the variable and access its history in the future.

Thanks a lot for your help!

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The material on this website is provided for informational purposes only and does not constitute an offer to sell, a solicitation to buy, or a recommendation or endorsement for any security or strategy, nor does it constitute an offer to provide investment advisory services by Quantopian.

In addition, the material offers no opinion with respect to the suitability of any security or specific investment. No information contained herein should be regarded as a suggestion to engage in or refrain from any investment-related course of action as none of Quantopian nor any of its affiliates is undertaking to provide investment advice, act as an adviser to any plan or entity subject to the Employee Retirement Income Security Act of 1974, as amended, individual retirement account or individual retirement annuity, or give advice in a fiduciary capacity with respect to the materials presented herein. If you are an individual retirement or other investor, contact your financial advisor or other fiduciary unrelated to Quantopian about whether any given investment idea, strategy, product or service described herein may be appropriate for your circumstances. All investments involve risk, including loss of principal. Quantopian makes no guarantees as to the accuracy or completeness of the views expressed in the website. The views are subject to change, and may have become unreliable for various reasons, including changes in market conditions or economic circumstances.