From 93b262165161089583d2ab02a5bb37bab464d995 Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Tue, 24 Sep 2019 07:07:06 +0200
Subject: [PATCH] Add format description for pairs.json file

---
 docs/data-download.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/docs/data-download.md b/docs/data-download.md
index b576e5c01..17565bb98 100644
--- a/docs/data-download.md
+++ b/docs/data-download.md
@@ -22,6 +22,18 @@ mkdir -p user_data/data/binance
 cp freqtrade/tests/testdata/pairs.json user_data/data/binance
 ```
 
+The format of the `pairs.json` file is a simple json list.
+Mixing different stake-currencies is allowed for this file, since it's only used for downloading.
+
+``` json
+[
+    "ETH/BTC",
+    "ETH/USDT",
+    "BTC/USDT",
+    "XRP/ETH"
+]
+```
+
 ### start download
 
 Then run: