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Improve the style of documentation (#1132)

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This commit improves the documentation (rst files) only in the
following three ways:

* Aligned section headers with their underline/overline punctuation characters

* Deleted all trailling whitespaces in rst files

* Deleted a few trailling newlines at the end of the rst files

Co-authored-by: Bingyao Liu <Bingyao.Liu@sofund.com>
This commit is contained in:
YaOzI
2022-07-07 19:42:27 +08:00
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commit 1dededa33f
29 changed files with 400 additions and 411 deletions
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docs/advanced/PIT.rst
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.. _pit:
===========================
============================
(P)oint-(I)n-(T)ime Database
===========================
============================
.. currentmodule:: qlib
Introduction
------------
Point-in-time data is a very important consideration when performing any sort of historical market analysis.
Point-in-time data is a very important consideration when performing any sort of historical market analysis.
For example, let’s say we are backtesting a trading strategy and we are using the past five years of historical data as our input.
Our model is assumed to trade once a day, at the market close, and we’ll say we are calculating the trading signal for 1 January 2020 in our backtest. At that point, we should only have data for 1 January 2020, 31 December 2019, 30 December 2019 etc.