We recently introduced a stock and futures trading simulator (paper trading) integrated into the TradesViz trading journal and it has quickly provided a lot of value for traders using it to practice their past trades during difficult market times.
A common feature request from users has been related to adding the ability to see their trades being executed automatically as the chart progresses - almost like watching a video of your trades. This makes a lot of sense because when you are trading, you might miss a lot of minor details that could have otherwise turned a losing trade into a winner or would have prevented you from losing more money in a worst-case scenario.
A replay feature built into the stock simulator tries to solve this problem by automatically executing your trades on a very low-timeframe (up to 5-sec) where you can easily adjust the speed of the simulation and even pause/play like a video to learn exactly where you went wrong.
Here's an example video where trade is being simulated - note that no action is being taken - no orders are placed manually. The replay system does all of this on its own:

Here's how the trade looks in a 1-minute chart:

and how it looks like in our new sub-minute 5-second chart:

With these features, TradesViz is not only a simple trade journaling tool but a truly all-in-one self-guided performance improvement platform for any trader.
All of these features are part of your account. We never add features for a new cost or increase our prices. We will remain ultra-competitive to give the best possible value to traders from all over the world. If you are serious about your trading and are looking for a proper solution to invest your time in, your search ends here: https://tradesviz.com/signup/.
Update Dec 2023:
Replay mode also shows your stop and profit targets on the first execution.

Update Apr 2026:
You can now turn on or off "Persist replay trades in simulator" in account settings (advanced settings) to either save the replied trades and have the ability to execute trades when replaying or just do plain replay.
If "Persist replay trades in simulator" is unchecked, then replay trades will not be saved in any trading accounts, and you won't be able to execute/modify executions when the replay is happening.