first time running a backtest.
changing the opening balance didn't seem to alter the opening position, draw-down or purchase limits.
changed the opening balance to $10,000 but the first trade was 1/4 million...
Hi Steven, Welcome to Quantopian!
You're hitting a common newcomer problem - it's something I know we have to fix, but we haven't fixed it yet. Sorry for the confusion.
When you set the opening balance, that balance used to compute your returns. It doesn't actually affect any trades the algo executes. So you have craaaaazy high returns because you're buying and selling huge amounts on a nominal start of $10,000. You need to write code for your own cash management to prevent yourself from going overboard. Check out this example.
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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.