I agree with rob559, you can use a momentum indicator such as Stochastic, MACD or RSI. However these indicators (which is completely free) or any commercial indicator, in itself is useless unless you interpret them correctly in accordance with the movement of price action itself.
Basically, what I mean is that no technical indicator will help you unless you understand the concept of price action. I would recommend you first learn how to read and interpret the charts in terms of Candlestick Formations, Support and Resistance levels and Fibonacci ratios. Once you understand price action and the structure of markets and their behaviour around SR (Support and Resistance) Zones in terms of previous price action, you then use a technical indicator such as the RSI to confirm your entry or exit out of a position.
Many new traders fall into the 'trap' of using technical indicators as their only reason for entering or exiting a position. This will land you into more trouble in the long run.
If you are interested in learning about the basics of technical trading, then check out this link:https://tradeempowered.us4.list-manage.com/track/click?u=5427bf57593195a7e5986680e&id=050dfd3ee3&e=05d904c05a
It is a Technical Trader Workshop hosted by a company in the USA called Trade Empowered and is completely free with no obligation whatsoever. I attended one of these workshops two years ago and it changed my perception of technical trading completely. I just like to emphasize that I am in no way affiliated to this company and neither have I enrolled in any of their formal trading courses, but the workshop opened my eyes completely.
If you wish to check out a video of what you can expect, then search for their YouTube videos presented by their founder Jason Stapleton at the link below:https://www.youtube.com/channel/UCe3O5ZLxQzGz4-nfl6XLEHQ
Again, I have no affiliation to Jason, or Trade Empowered, but these guys are extremely good at what they do in teaching new traders the basics of technical trading and understanding how markets work and behave. I think this will be a good starting point for you. The only advice I can give you is to learn everything you can and then formulate your own Trading Plan, Trading Strategy and Trading Rules. Treat trading as a business and run it as one with great discipline. Success will follow.
Keep it simple, be disciplined, get rich slowly and above all protect your equity!