Forex Tester has many built-in trend indicators: Moving Averages, Bollinger Bands, Envelopes, Ichimoku, Parabolic SAR, etc. The full list of the indicators that we offer is available on the Using Indicators page.
Moreover, you can convert your own indicator from MT4 via File ->Install -> Install new indicator menu (in mq4-format)

Read more about MQL to FT4 converter: https://forextester.com/free-mt4-indicators-eas-converter