Guides / Rule playground

Rule playground · about 8 min

From English to rule

Ask about what is true now in plain English, see the rule Ora compiled it to, and learn when to write the rule yourself.

1. Ask in English

   Eleven questions about TSLA: ten about now, one about next week.

   {
     "model": "ora-fin1",
     "state": {
       "symbol": "TSLA"
     },
     "questions": {
       "above_200d": {
         "type": "yes_no",
         "instructions": "Is it above its 200-day moving average?"
       },
       "rsi_70": {
         "type": "yes_no",
         "instructions": "Is RSI above 70?"
       },
       "over_prior_high": {
         "type": "yes_no",
         "instructions": "Did it close above yesterday's high?"
       },
       "golden": {
         "type": "yes_no",
         "instructions": "Is the 50-day moving average above the 200-day?"
       },
       "off_high": {
         "type": "yes_no",
         "instructions": "Is it down more than 10% from its 52-week high?"
       },
       "three_down": {
         "type": "yes_no",
         "instructions": "Did it close lower three days in a row?"
       },
       "busy": {
         "type": "yes_no",
         "instructions": "Is volume above its 20-day average?"
       },
       "inside": {
         "type": "yes_no",
         "instructions": "Is today an inside bar?"
       },
       "engulf": {
         "type": "yes_no",
         "instructions": "Is today a bullish engulfing candle?"
       },
       "at_high": {
         "type": "yes_no",
         "instructions": "Is it at a 52-week high?"
       },
       "up_week": {
         "type": "yes_no",
         "instructions": "Will the stock be higher in a week?"
       }
     }
   }

   Open this in the Playground

2. See what each one became

   Session of 2026-10-30. A rule means the rule engine answered; none means the forecast model did:

   Question	Rule it ran	Belief	basis
   above_200d	C > sma(C, 200)	0.777	comparison
   rsi_70	rsi(C, 14) > 70	0.0873	comparison
   over_prior_high	C > H[-1]	0.1868	comparison
   golden	sma(C, 50) > sma(C, 200)	0.0768	comparison
   off_high	C < 0.9 * max(H, 252)	0.9438	pattern
   three_down	(C < C[-1]) and (C[-1] < C[-2]) and (C[-2] < C[-3])	0.5667	pattern
   busy	V > 1 * ref(avg(V, 20), -1)	0.7212	pattern
   inside	inside_bar()	0.0795	pattern
   engulf	engulfing_bull()	0.2167	pattern
   at_high	none: forecast	0.533	forecast
   up_week	none: forecast	0.487	forecast

3. Read the basis

   comparison is a compiled comparison (it adds an explain, here today's close > sma200); pattern is a compiled shape such as (C < C[-1]) and (C[-1] < C[-2]) and (C[-2] < C[-3]). Compiled rules are ordinary rules: copy one into ask to pin it.

4. Spot the one that did not compile

   "Is it at a 52-week high?" came back as a forecast (0.533), not a fact. When you mean the fact, write it. Three ways to write it are three different questions; on XLE, which trades near its highs:

   Question	Rule	Belief
   at_high	H >= max(H, 252)	0.5
   near_high	C >= 0.98 * max(H, 252)	0.8442
   new_high	H > highest(H, 252)	0.6196

   H >= max(H, 252) can at best tie (0.50); the 2% band and the excluding form say what you mean.

   Open this in the Playground

5. Rule of thumb

   English for exploring and for forecasts; ask for anything a decision depends on, so the rule cannot change underneath you. The language: Rule language.

Information, not investment advice. Every number on this page is a real response for the session shown; answers change with each session.

What's next

• Combining conditions
• Function reference