Journal of Investment Strategies
ISSN:
2047-1238 (print)
2047-1246 (online)
Editor-in-chief: Ali Hirsa
Need to know
- We provide unit tests to be able to ensure correctness of backtest software.
- Correctness is ensured for order setups like limit buy order combined with stop loss.
- We find all possible backtest results on candle data for non-unique situations.
- We hint to algorithmic considerations to allow for a fast implementation of unit tests.
Abstract
In recent years, several trading platforms have appeared that provide a backtest engine to calculate the historic performance of self-designed trading strategies on underlying candle data. The construction of an accurate backtest engine is, however, a subtle task, as shown in previous work by Maier-Paape and Platen. Several platforms are struggling to achieve accuracy. We discuss how the accuracy of backtest engines can be verified and provide models for candles and intra-period prices, which may be applied to conduct a “proof of correctness” for a given backtest engine when our tests on specific model candles are successful. Further, we suggest algorithmic considerations in order to allow a fast implementation of the tests necessary for the proof of correctness.
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