Indicator Helpers

Helper functions are utility tools that work alongside indicators to generate signals and evaluate conditions. Most are real-time with no lag — they simply compare values on the current bar. Use them to build composite trading rules from individual indicator outputs.

Crossover

Crossunder

has_any_lower_then_threshold

Indicators at a glance

Indicator	Type	Warmup	Lag	When to use
Crossover	🟢 Real-time	2 bars	0 bars	Detects when one series crosses above another (e.g. SMA 50 crosses above SMA 200 — a golden cross). Use it to generate entry signals from any two overlapping indicators.
Is Crossover	🟢 Real-time	2 bars	0 bars	A boolean check: did a crossover happen on the current bar? Use it in conditional logic when you only need a True/False answer.
Crossunder	🟢 Real-time	2 bars	0 bars	Detects when one series crosses below another (e.g. SMA 50 crosses below SMA 200 — a death cross). Use it to generate exit or short signals.
Is Crossunder	🟢 Real-time	2 bars	0 bars	A boolean check: did a crossunder happen on the current bar? Use it in conditional logic when you only need a True/False answer.
Is Downtrend	🔴 Lagging	slow_ema_period bars	≈ (slow_ema_period − 1) / 2 bars	Checks if the market is in a downtrend using EMA 50 / EMA 200 death cross. Use it as a directional filter to avoid buying in a bear market.
Is Uptrend	🔴 Lagging	slow_ema_period bars	≈ (slow_ema_period − 1) / 2 bars	Checks if the market is in an uptrend using EMA 50 / EMA 200 golden cross. Use it as a directional filter to avoid selling in a bull market.
has_any_lower_then_threshold	🟢 Real-time	1 bar	0 bars	Checks if any value in a lookback window is below a threshold (e.g. RSI < 30). Use it for conditional rules like 'has RSI been oversold recently?'.

Detailed descriptions

Crossover

🟢 Real-time

Warmup: 2 bars (default: 2 bars)

Detects when one series crosses above another (e.g. SMA 50 crosses above SMA 200 — a golden cross). Use it to generate entry signals from any two overlapping indicators.

Is Crossover

🟢 Real-time

Warmup: 2 bars (default: 2 bars)

A boolean check: did a crossover happen on the current bar? Use it in conditional logic when you only need a True/False answer.

Crossunder

🟢 Real-time

Warmup: 2 bars (default: 2 bars)

Detects when one series crosses below another (e.g. SMA 50 crosses below SMA 200 — a death cross). Use it to generate exit or short signals.

Is Crossunder

🟢 Real-time

Warmup: 2 bars (default: 2 bars)

A boolean check: did a crossunder happen on the current bar? Use it in conditional logic when you only need a True/False answer.

Is Downtrend

🔴 Lagging — ≈ (slow_ema_period − 1) / 2 bars

Warmup: slow_ema_period bars (default: 200 bars (slow_ema_period=200))

Checks if the market is in a downtrend using EMA 50 / EMA 200 death cross. Use it as a directional filter to avoid buying in a bear market.

Is Uptrend

🔴 Lagging — ≈ (slow_ema_period − 1) / 2 bars

Warmup: slow_ema_period bars (default: 200 bars (slow_ema_period=200))

Checks if the market is in an uptrend using EMA 50 / EMA 200 golden cross. Use it as a directional filter to avoid selling in a bull market.

has_any_lower_then_threshold

🟢 Real-time

Warmup: 1 bar (default: 1 bar)

Checks if any value in a lookback window is below a threshold (e.g. RSI < 30). Use it for conditional rules like 'has RSI been oversold recently?'.