The Strategy Tester runs the script itself, fills at the next open, charges commission and slippage, and puts every trade on the chart. The optimiser sweeps the settings and judges them on data it never fitted.
Nothing read from a bar that has not closed. Entries fill at the next open, commission and slippage are charged, and the run is of your script as written, not a stand-in.
Each entry and exit is marked where it happened. The trade list, the equity curve against simply holding the stock and a plain summary sit underneath.
Sweeps up to four settings and walks forward: fitted on the past, judged on the slice it never saw. Accept a result as a new version of the script.
How it compares: Alpha Charts vs TrendSpider · Alpha Charts vs LuxAlgo · Alpha Charts vs TradingView AI Copilot
Net profit, the number of trades, the share that won, profit factor, the deepest drawdown and the average trade, then the performance and drawdown tabs and every trade in a list.
About the last third of the history is kept apart and judged on its own, with its dates. The verdict reads survived, decayed, did not survive, or too few trades to judge.
The equity curve is drawn beside simply holding the stock over the same dates, so a strategy that only followed the market shows it.
The same script also runs on seven other large US stocks, so you see whether it worked beyond the one chart you picked.
0.05% commission and 0.025% slippage come off each side of every trade unless your script sets its own commission, and every trade fills at the next open.
Pick up to four of the script's inputs and it runs every combination. Then it asks two questions: does the best result beat what the best of that many random tries would score, and do the settings next to it hold up too? The answer comes back in words: clears the noise floor, one step away it falls apart, no better than guessing, or too little data to judge. A result you accept becomes a new version of the script. The optimiser comes with Pro and Max.
The Strategy Tester is on every plan, from Base at $49.99 a month or $39.99 a month billed yearly, and every plan comes with 30 days money back. A free account backtests as often as it likes on the Free plan, from the free tester, no card needed.
Look for three things: it runs your exact script rather than a rewrite, it charges commission and slippage by default, and it judges the result on a period the strategy was not tuned on. TradingView's AI Copilot reads TradingView's own strategy reports, and a general chat model tests a Python copy of your rules on data you upload or connect. Alpha Charts does all three on US stocks and ETFs.
Keeping the most recent part of the history apart and judging the strategy on it alone. A rule that only made money on the part it was built on usually fails there, which is what the second period is for.
Yes. Paste the Pine v6 strategy and the tester runs it as written on US stocks and ETFs. If the script uses something the tester cannot run, the run stops and says so rather than guessing.
The Strategy Tester is on every plan, from $49.99 a month, and every plan comes with 30 days money back. A free account backtests as often as it likes on the Free plan, no card needed.
Sources, read on 20 October 2026: TradingView's help page “Getting started with AI Copilot” and OpenAI's help page “Data analysis with ChatGPT”. TradingView and ChatGPT belong to their owners, and Alpha Charts is not affiliated with them.