Hello amberouserous,
The signals applied to the same chart will work as a single strategy. It can be calculated on your chart in backtesting, forward testing or auto trading mode.
Your strategy only knows about the orders and positions it generated during one calculation session on a specific chart in a specific mode. If auto trading is enabled, it causes re-calculation.
The strategy will not be aware of orders and positions placed by other strategies on the same symbol or by the same strategy on another chart.
To start calculation and order generation with a required position, you can use the “Assign Initial Market Position to Strategy” option.
According to your setting in Format -> Strategy Properties -> Auto trading tab -> Assign Initial Market Position to Strategy section, the window prompting you to select the position to start with will appear when you enable auto trading.
Please note that this setting is separate for each strategy.
Find more info about it
here.
And to see the keywords you use in your script in action and understand how they work, you could use
Paper Trader or a SIM account if you have one.