Add map to discovery readme

discovery/README.md

@@ -2,6 +2,28 @@
 
 This menu aims to discover new stocks, and the usage of the following commands along with an example will be exploited below.
 
+  * [map](#map)    
+    - S&P500 index stocks map [Finviz]
+  * [sectors](#sectors)       
+    - show sectors performance [Alpha Vantage]
+  * [gainers](#gainers)
+    - show latest top gainers [Yahoo Finance]
+  * [orders](#orders)
+    - orders by Fidelity Customers [Fidelity]
+  * [earnings](#earnings)
+    - next earnings release dates [Seeking Alpha]
+  * [high_short](#high_short)   
+    - show top high short interest stocks of over 20% ratio [www.highshortinterest.com]
+  * [low_float](#low_float)
+    - show low float stocks under 10M shares float [www.lowfloat.com]
+  * [sw](#sw)            
+    - Simply Wall St. research data [Simply Wall St.]
+  * [spachero](#spachero)
+    - best website for SPACs research [SpacHero]
+  * [uwhales](#uwhales)
+    - good website for SPACs research [UnusualWhales]
+
+
 ```
 map           S&P500 index stocks map [Finviz]
 sectors       show sectors performance [Alpha Vantage]
@@ -15,22 +37,33 @@ spachero      best website for SPACs research [SpacHero]
 uwhales       good website for SPACs research [UnusualWhales]
 ```
 
-## map
+## map <a name="map"></a>
 
-## sectors
+```
+usage: map [-p {1d,1w,1m,3m,6m,1y}] [-t {sp500,world,full,etf}]
+```
+Performance index stocks map categorized by sectors and industries. Size represents market cap. Opens web-browser. [Source: Finviz]
+  * -p : Performance period. Default 1 day.
+  * -t : Map filter type. Default S&P500.
 
-## gainers
+Example:
+![map_filter](https://user-images.githubusercontent.com/25267873/108570986-032a4800-7307-11eb-8c8d-f62409c11e06.png)
 
-## orders
 
-## earnings
+## sectors <a name="sectors"></a>
 
-## high_short
+## gainers <a name="gainers"></a>
 
-## low_float
+## orders <a name="orders"></a>
 
-## sw
+## earnings <a name="earnings"></a>
 
-## spachero
+## high_short <a name="high_short"></a>
 
-## uwhales
+## low_float <a name="low_float"></a>
+
+## sw <a name="sw"></a>
+
+## spachero <a name="spachero"></a>
+
+## uwhales <a name="uwhales"></a>