Charts
When starting Forex Simulator, it will automatically open one H1 chart for every selected instrument. You can recognize simulator's charts by their names which end with .sim. You can work with these charts in the same way as you work with other charts. You can use all drawing tools available in Metatrader to add markup.
Opening Charts
To open a new chart click on New Chart in main menu and choose the instrument from the drop-down list. The chart should open immediately.

To change timeframe use the buttons in Metatrader's top menu or right-click on the chart and choose Timeframes.
The following timeframes are available on Metatrader 5:
- M1, M2, M3, M4, M5, M6, M10, M12, M15, M20, M30
- H1, H2, H3, H4, H6, H8, H12
- Daily, Weekly, Monthly

Control Buttons
Every chart opened by the simulator is equipped with 4 control buttons in its top right corner. They let you control if the following things are displayed:

- History
Show/Hide the history of trading (closed trades) - Trades
Show/Hide open market trades and pending orders - Avg
Avg stands for average position. When you have at least two trades of the same type (e.g. two buys or two sells), Avg button will show you the average position of these trades as a line on the chart, separately for buy orders and sell orders. - News
Show/Hide economic events
Indicators
You can use all standard (built-in) MT5 indicators such as RSI, MA or ATR. So you can use every indicator which comes with Metatrader 5.
Custom indicators
Unfortunately, not every custom indicator will work correctly on the simulator. Some will work fine. Some may need small adjustments in the source code. Sometimes they just won't work. It is because the environment created in the simulation is a bit different from live environment. Some MQL5 functions used in custom indicators may not work correctly in the simulation.
Templates
You can use chart templates on the simulator, as you normally do on Metatrader. You can apply a template to the chart with right-click on the chart -> Templates -> Load Template or from Metatrader's menu.

Auto-loading templates
If you save a template as default (default.tpl), it will be loaded automatically for every newly opened chart.