added stooq link

Author: stefan-jansen

data/create_stooq_data.ipynb

@@ -11,7 +11,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "This notebook contains information on downloading the STOOQ stock andETF price data that we use in [Chapter 09](../09_time_series_models) for a pairs trading strategy based on cointegration and [Chapter 11](../11_decision_trees_random_forests) for a long-short strategy using Random Forest return predictions."
+    "This notebook contains information on downloading the STOOQ stock and ETF price data that we use in [Chapter 09](../09_time_series_models) for a pairs trading strategy based on cointegration and [Chapter 11](../11_decision_trees_random_forests) for a long-short strategy using Random Forest return predictions."
    ]
   },
   {
@@ -71,7 +71,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Modify path if you would like to store the data elsewhere and change the notebooks accordingly"
+    "Modify the path to the `DATA_STORE` if you would like to store the data elsewhere and change the notebooks accordingly"
    ]
   },
   {
@@ -101,7 +101,7 @@
    "source": [
     "> Note that the below downloading details may change at any time as Stooq updates their website; if you encounter errors, please inspect their website and raise a GitHub issue to let us know so we can update the information.\n",
     "\n",
-    "> Update 12/2020: please note that STOOQ will disable automatic downloads and require CAPTCHA starting Dec 10, 2020 so that the code that downloads and unpacks the zip files will no longer work; please navigate to their website using the below link for manual download."
+    "> Update 12/2020: please note that STOOQ will disable automatic downloads and require CAPTCHA starting Dec 10, 2020 so that the code that downloads and unpacks the zip files will no longer work; please navigate to their website [here](https://stooq.com/db/h/) for manual download."
    ]
   },
   {