I use neither. But I've heard of just one of the two you mentioned. I've never heard of tradeDash but I've surely heard of Coinigy wnd it doesn't come cheap so I don't use it since I'm a beginner trader. Instead, I use tradingview.com. They've a free plan that gives users access to a host of trading tools with the restriction of only 3 indicators per chart. However, this is compensated with the unlimited access to use the drawing tools. What's more, you can get access to insights like ideas of other traders etc.