Forecast Oscillator

Technical Analysis Indicator: fosc

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Function Prototype

/* Forecast Oscillator */
/* Type: indicator */
/* Input arrays: 1    Options: 1    Output arrays: 1 */
/* Inputs: real */
/* Options: period */
/* Outputs: fosc */
int ti_fosc_start(TI_REAL const *options);
int ti_fosc(int size,
      TI_REAL const *const *inputs,
      TI_REAL const *options,
      TI_REAL *const *outputs);

Description

This documentation is still a work in progress. It has omissions, and it probably has errors too. If you see any issues, or have any general feedback, please get in touch.

The Forecast Oscillator is used to show how closely the price is tracking a linear regression forecast.

Forecast Oscillator takes on parameter, the period n, which is passed to the Time Series Forecast function used in it's calculation.

It is calculated for each bar as follows:

$$fosc_{t} = 100 \frac{close_{t} - tsf_{t-1}}{close_{t}} $$

See Also

References

Example Usage

Calling From C

/* Example usage of Forecast Oscillator */
/* Assuming that 'input' is a pre-loaded array of size 'in_size'. */
TI_REAL *inputs[] = {input};
TI_REAL options[] = {5}; /* period */
TI_REAL *outputs[1]; /* fosc */

/* Determine how large the output size is for our options. */
const int out_size = in_size - ti_fosc_start(options);

/* Allocate memory for output. */
outputs[0] = malloc(sizeof(TI_REAL) * out_size); assert(outputs[0] != 0); /* fosc */

/* Run the actual calculation. */
const int ret = ti_fosc(in_size, inputs, options, outputs);
assert(ret == TI_OKAY);

Calling From Lua (with Tulip Chart bindings)

-- Example usage of Forecast Oscillator
fosc = ti.fosc(input, 5)

Example Calculation

period = 5

dateinputfosc
2005-11-0181.59
2005-11-0281.06
2005-11-0382.87
2005-11-0483.00
2005-11-0783.61
2005-11-0883.15-1.29
2005-11-0982.84-1.66
2005-11-1083.991.04
2005-11-1184.551.03
2005-11-1484.36-0.10
2005-11-1585.530.60
2005-11-1686.540.65
2005-11-1786.890.08
2005-11-1887.770.16
2005-11-2187.29-1.58

Chart

 

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