Merge branch 'develop' into feat/dataprovider

docs/bot-optimization.md

@@ -222,12 +222,40 @@ This is the set of candles the bot should download and use for the analysis.
 Common values are `"1m"`, `"5m"`, `"15m"`, `"1h"`, however all values supported by your exchange should work.
 
 Please note that the same buy/sell signals may work with one interval, but not the other.
+This setting is accessible within the strategy by using `self.ticker_interval`.
 
 ### Metadata dict
 
 The metadata-dict (available for `populate_buy_trend`, `populate_sell_trend`, `populate_indicators`) contains additional information.
 Currently this is `pair`, which can be accessed using `metadata['pair']` - and will return a pair in the format `XRP/BTC`.
 
+The Metadata-dict should not be modified and does not persist information across multiple calls.
+Instead, have a look at the section [Storing information](#Storing-information)
+
+### Storing information
+
+Storing information can be accomplished by crating a new dictionary within the strategy class.
+
+The name of the variable can be choosen at will, but should be prefixed with `cust_` to avoid naming collisions with predefined strategy variables.
+
+```python
+class Awesomestrategy(IStrategy):
+    # Create custom dictionary
+    cust_info = {}
+    def populate_indicators(self, dataframe: DataFrame, metadata: dict) -> DataFrame:
+        # Check if the entry already exists
+        if "crosstime" in self.cust_info[metadata["pair"]:
+            self.cust_info[metadata["pair"]["crosstime"] += 1
+        else:
+            self.cust_info[metadata["pair"]["crosstime"] = 1
+```
+
+!!! Warning:
+  The data is not persisted after a bot-restart (or config-reload). Also, the amount of data should be kept smallish (no DataFrames and such), otherwise the bot will start to consume a lot of memory and eventually run out of memory and crash.
+
+!!! Note:
+  If the data is pair-specific, make sure to use pair as one of the keys in the dictionary.
+
 ### Additional data (DataProvider)
 
 The strategy provides access to the `DataProvider`. This allows you to get additional data to use in your strategy.
@@ -317,7 +345,6 @@ if self.wallets:
 - `get_used(asset)` - currently tied up balance (open orders)
 - `get_total(asset)` - total available balance - sum of the 2 above
 
-
 ### Where is the default strategy?
 
 The default buy strategy is located in the file

docs/developer.md

@@ -4,8 +4,20 @@ This page is intended for developers of FreqTrade, people who want to contribute
 
 All contributions, bug reports, bug fixes, documentation improvements, enhancements and ideas are welcome. We [track issues](https://github.com/freqtrade/freqtrade/issues) on [GitHub](https://github.com) and also have a dev channel in [slack](https://join.slack.com/t/highfrequencybot/shared_invite/enQtMjQ5NTM0OTYzMzY3LWMxYzE3M2MxNDdjMGM3ZTYwNzFjMGIwZGRjNTc3ZGU3MGE3NzdmZGMwNmU3NDM5ZTNmM2Y3NjRiNzk4NmM4OGE) where you can ask questions.
 
+## Documentation
 
-## Module 
+Documentation is available at [https://freqtrade.io](https://www.freqtrade.io/) and needs to be provided with every new feature PR.
+
+Special fields for the documentation (like Note boxes, ...) can be found [here](https://squidfunk.github.io/mkdocs-material/extensions/admonition/).
+
+## Developer setup
+
+To configure a development environment, use best use the `setup.sh` script and answer "y" when asked "Do you want to install dependencies for dev [y/N]? ".
+Alternatively (if your system is not supported by the setup.sh script), follow the manual installation process and run `pip3 install -r requirements-dev.txt`.
+
+This will install all required tools for development, including `pytest`, `flake8`, `mypy`, and `coveralls`.
+
+## Modules
 
 ### Dynamic Pairlist