since i was in china, the timezone in logs and transactions is CST(China Standard Time). My questions are:
1 how the algorithm identify the timezone?
2 Is there a way to set the timezone for logs and transactions.
how the algorithm identify the timezone?
Great question. The logs and transactions use the client computer timezone. More precisely, the logs and transactions use the timezone reported by the browser which they are running. The intention is to have a backtest 'look and feel' as if it were running real time. The times therefore reflect a users current timezone. Understandably, this can be confusing especially if one travels and changes timezones.
There isn't a way to change this behavior within Quantopian. However, there are some browser extensions which can help. I personally use a Chrome extension called 'Change Timezone'. It's a simple extension which allows one to set the timezone the browser 'sees' separate from that which is set by the computer. I like setting the timezone to 'US Eastern' so all the logs align with the US market hours. There are other extensions which do the same thing and I'm not promoting this one. Just offering it as an example. Other browsers may have similar extensions.
Hope that helped.
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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.