Topic: Graph of ticker with buy/sell marked, to learn from your mistakes
Think of this as an enhancement to the "relative performance" type of graphs:
I often have wished I could visualize my trades on a stock price graph, basically an overlay of a stock price graph that shows when I opened and closed a position in a certain stock.
I think this would be a helpful learning tool, basically to evaluate in retrospect whether the timing of the open/close (buy/sell or shortsell/cover) was good or not so good.
In terms of of implementation, I think a simple 2-color graph similar to the Charts menu (relative performance menu), but the benchmark curve should be the stock itself, just restricted in time to the holding period deduced from the transaction database.
There is of course the added complication that one might have multiple, time-overlapping transactions. I guess multiple colors and markers might solve this, plus some logic to pair buy/sell transactions.
Then there is the possibility of selling half your position, then what, and so on. Yeah, it can get a bit complicated of it is going to handle all possible cases.
This feature is on the top of my list of never-seen-elsewhere features.
By the way, I read about Icarra2 on Barry Ritholtz "The Big Picture" blog, that's how I arrived here.