Question: How many instances(trading algorithms/indicators) can I run on cTrader platform at the same time?
There is no limitations to the number of Instances(Custom Indicators and Trading Programs) you can run on cTrader and cAlgo at the same time.
You can run as many as instances you want.
But please be aware of the capacity of your PC, as running too many instances and trading programs can consume large amount of RAM and slow the operation of your PC itself.
The processing speed of your computer can directly affect the quality of order execution.