Restore home page chart examples

[DaveSkender]

During initial migration of the doc site (#1739) the indicators shown in the examples chart were changed. We want the prior indicators restored and new ones removed.

Currently in v3 branch:

Prior charts:

Charts should only contain these indicators:

1. Overlay chart
   • EMA(200)
   • EMA(50)
   • LINEAR(30)
   • MARUBOZU(90%)
   • ATR-STOP(21,3,CLOSE)
2. First oscillators chart
   • MACD(12,26,9)
3. Second oscillator chart
   • STC(10,23,50)