added RSI to docs

docs/Configuring_gekko.md

@@ -72,6 +72,7 @@ Gekko supports a number of technical analysis indicators, currently it supports
 - DEMA
 - MACD
 - PPO
+- RSI
 
 Open up the config.js file again and configure at this part:
 
@@ -177,6 +178,26 @@ Very similar to MACD but also a little different, read more [here](http://stockc
 - the down treshold and the up treshold tell Gekko how big the difference in the lines needs to be for it to be considered a trend. If you set these to 0 each line cross would trigger new advice.
 - persistence tells Gekko how long the thresholds needs to be met until Gekko considers the trend to be valid.
 
+### RSI
+
+The Relative Strength Index is a momentum oscillator that measures the speed and change of price movements. Read more about it [here](http://stockcharts.com/help/doku.php?id=chart_school:technical_indicators:relative_strength_in). Configure it like so:
+
+    // RSI settings:
+    config.RSI = {
+      interval: 14,
+      thresholds: {
+        low: 30,
+        high: 70,
+        // How many candle intervals should a trend persist
+        // before we consider it real?
+        persistence: 1
+      }
+    };
+
+- The interval is the amount of periods the RSI should use.
+- The thresholds determine what level of RSI would trigger an up or downtrend.
+- persistence tells Gekko how long the thresholds needs to be met until Gekko considers the trend to be valid.
+
 ## Enabling plugins
 
 Gekko currently has a couple plugins:

docs/internals/trading_methods.md

@@ -2,7 +2,7 @@
 
 The trading methods are the core of Gekko's trading bot. They look at the market and decide what to do based on technical analysis. The trading methods can calculate indicators on top of the market data to come up with an advice for a position to take in the market. As of now the trading method is limited to a single market on a single exchange.
 
-Gekko currently has three indicators ready, only implementing a single indicator: DEMA, MACD and PPO. Besides those you can also create your own trading method by using javascript. The easiest way to do this is open the file `gekko/methods/custom.js` and write your own trading method.
+Gekko currently has a couple of methods already, only implementing a single indicator: DEMA, MACD, RSI and PPO. Besides those you can also create your own trading method by using javascript. The easiest way to do this is open the file `gekko/methods/custom.js` and write your own trading method.
 
 ## Creating a trading method
 
@@ -95,6 +95,10 @@ In your check or update method:
 
     var result = this.indicators.mymacd.result;
 
+#### Supported indicators
+
+Gekko currently supports EMA, SMA, PPO, RSI and MACD.
+
 ### Configurables
 
 You can create configurable parameters for your method which allows you to adjust the behaviour for your trading method. This way you can create one method but have different implementations running at the same time on different markets. You can achieve this by creating some parameters which can be changed in the config.js file: