Are there any tools that you use to alert you on specific stock activity or target prices?

For example, I have several individual stocks that I check maybe once per week, but I've missed out on 40% gains because I missed a spike. I don't have time to continuously follow my positions.

What are some methods to catch these spikes? Is there anything that can alert your mobile device?

TIA.

I use TDAmeritrade's ThinkOrSwim Platform. It's free to download if you open a brokerage account (don't have to fund).

You can pick certain equities and set price alerts that can be triggered on both their desktop platform as well the mobile version.

https://www.theverge.com/2018/4/29/17286148/silicon-valley-gilfoyle-napalm-death-bitcoin-price

Sorry, had to. But to give you a real answer, I just use stops, limits, etc. to execute trades if I am going to be busy. I typically don't trade much short-term anyway.

Just don't check them

tradestops.com

have to pay for it.

If you only want to log into your brokerage once per week, I'd say take a few minutes to analyze where you see the value you want, and place a Good until Canceled Limit order at your price. Adjust weekly as you log in.